{"id":114276,"date":"2025-03-09T08:46:08","date_gmt":"2025-03-09T07:46:08","guid":{"rendered":"https:\/\/aquainfo.nl\/?p=114276"},"modified":"2025-03-11T08:30:40","modified_gmt":"2025-03-11T07:30:40","slug":"17-5-2-size-of-goldfish","status":"publish","type":"post","link":"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/","title":{"rendered":"17.5.2. Size of Goldfish"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87_1 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#Goldfish_Size_In_a_Nutshell\" >Goldfish Size In a Nutshell<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#In_Depth_Analysis_of_Goldfish_Size\" >In Depth Analysis of Goldfish Size<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#Growth_Inhibiting_Hormones\" >Growth Inhibiting Hormones<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#Darwins_%E2%80%9CSurvival_of_the_Fittest%E2%80%9D\" >Darwin\u2019s \u201cSurvival of the Fittest\u201d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#Growth_Rate_of_Goldfish\" >Growth Rate of Goldfish<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#Further_Articles_on_Goldfish\" >Further Articles on Goldfish<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#1751_Types_of_Goldfish\" >17.5.1. Types of Goldfish<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#1753_Stocking_Goldfish\" >17.5.3. Stocking Goldfish<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/#1754_Goldfish_Care\" >17.5.4. Goldfish Care<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Goldfish_Size_In_a_Nutshell\"><\/span>Goldfish Size In a Nutshell<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In a small aquarium a common goldfish will grow to possibly four inches and no greater. In a large lake a common goldfish will normally grow to six inches with an occasional fish getting to eight inches. If you want a bit of a rant followed by a very long and boring analysis of the subject read on.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_40811\"><img decoding=\"async\" width=\"964\" height=\"718\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish3-1.jpg\" alt=\"Fancy Goldfish\" class=\"wp-image-114311\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish3-1.jpg 964w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish3-1-300x223.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish3-1-150x112.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish3-1-600x447.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish3-1-768x572.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish3-1-441x328.jpg 441w\" sizes=\"(max-width: 964px) 100vw, 964px\" \/><figcaption class=\"wp-element-caption\">Fancy Goldfish<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"In_Depth_Analysis_of_Goldfish_Size\"><\/span>In Depth Analysis of Goldfish Size<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One of the common threads to the PETA campaign against goldfish in aquariums has been hugely exaggerating the size a goldfish will ultimately grow to. \u201cGoldfish will be one foot in ponds\u201d is a common refrain. One commentator said two feet! The website seriouslyfishy.com out of England said:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><em>\u201cFor example a goldfish, Carassius auratus, maintained in a 30 cm x 20 cm aquarium may survive for a number of years and remain at a manageable size of a few centimeters&nbsp;in length, and initially this might seem a reasonable outcome.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>However, when maintained properly C. auratus can reach 30 cm SL and live for 30 or 40 years meaning the hypothetical individual described above would not only be highly stunted in terms of growth but fail to reach a quarter of its potential age even if it survives for 5 or 6 years.\u201d<\/em><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">(http:\/\/www.seriouslyfish.com\/stunted-growth-means-stunted-lives\/)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Understand 30 centimeters SL [standard length] equates to 12 inches SL or 15 inches total length for a common goldfish. This British site is obviously one of the many websites which front for PETA. The claims in this website are&nbsp;<strong>ALL<\/strong>&nbsp;completely fictional. These claims are simply designed to prevent keeping goldfish in&nbsp;<strong>ANY<\/strong>&nbsp;aquarium via&nbsp;<strong>ANY<\/strong>&nbsp;means necessary, including just out and out lies. This is a classic case of an extremist view where they think the \u201cend justifies the means\u201d.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\" id=\"attachment_16433\"><img decoding=\"async\" width=\"1024\" height=\"526\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-1024x526.jpg\" alt=\"Ryukin Goldfish\" class=\"wp-image-114309\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-1024x526.jpg 1024w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-300x154.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-150x77.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-600x308.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-768x395.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-990x509.jpg 990w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish-441x227.jpg 441w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Ryukin-Goldfish.jpg 1047w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Ryukin Goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">What is the truth about goldfish size? References are always useful:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201c<em>All modern goldfish are decedent from Chinese Crucial Carp. There is some debate on whether or not the Japanese Crucial Carp is the ancestor from which modern goldfish have evolved, but this has been debunked by a well-documented experiment in which gene sequences of goldfish were tested<\/em>\u201c<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">(Komiyama et al., 2009, pp 5-11)<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><em>\u201c<\/em><strong><em>The crucian carp is a medium-sized cyprinid, typically 15 cm in body length\u201d<\/em><\/strong><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">(https:\/\/www.fishbase.in\/summary\/Carassius-carassius.html)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So the ancestor of the goldfish averages 15 centimeters or 5.9 inches in body length (not including the tail).<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_43012\"><img decoding=\"async\" width=\"873\" height=\"827\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Oranda.jpg\" alt=\"Black Oranda\" class=\"wp-image-114307\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Oranda.jpg 873w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Oranda-300x284.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Oranda-150x142.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Oranda-600x568.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Oranda-768x728.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Oranda-441x418.jpg 441w\" sizes=\"(max-width: 873px) 100vw, 873px\" \/><figcaption class=\"wp-element-caption\">Black Oranda<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In the wild, per the USGS, goldfish attain a size of 12 to 22 centimeter, or 4.7 to 8.7 inches standard length (otherwise known as body length exclusive of the tail fin). (https:\/\/nas.er.usgs.gov\/queries\/factsheet.aspx?SpeciesID=508). The average of 12 and 22 is 17 cm (6.7 inches).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So the PETA folks are claiming a 12 inch (30 centimeters) body length on a fish who biologists say only get 5.9 to 6.7 inches (15 to 17 centimeters) in body length.&nbsp; Understand, a 12 inch fish will weigh 8 (that\u2019s right 8!) times the weight of a 6 inch fish, so this difference between fiction and reality is huge.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Now one adaption that many fish including the goldfish have is that each brood of young will produce large variations in ultimate size. This is a very useful trait that insures survival of the goldfish species. But it also results in what in scientific terms are called \u201coutliers\u201d. In a million goldfish there will always be a few fish which are very small and a few fish which are extremely large. This does not define the size of the species nor does it define the size a fish can be expected to attain in an aquarium.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16434\"><img decoding=\"async\" width=\"503\" height=\"350\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/shubunkin-goldfish2.jpg\" alt=\"shubunkin goldfish\" class=\"wp-image-114305\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/shubunkin-goldfish2.jpg 503w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/shubunkin-goldfish2-300x209.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/shubunkin-goldfish2-150x104.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/shubunkin-goldfish2-441x307.jpg 441w\" sizes=\"(max-width: 503px) 100vw, 503px\" \/><figcaption class=\"wp-element-caption\">shubunkin goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This size of 5.9 to 6.7 inches (15 to 17 centimeters) will raise howls of protest. But I have a fish breeder down the road who builds ponds for a living and breeds both veiltail goldfish and koi for people to put in those ponds. He has ponds on his property which have been breeding goldfish for thirty years. And when he nets these goldfish the largest fish that can be seen measures in at just six inches of body length with a tape measure (I\u2019ve personally measured them!). Note he doesn\u2019t sell the large fish as they are the best breeders.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Another proof can be found on the YouTube channel Ohio Fish Rescue. This outfit takes in fish that have gotten too big for the aquariums they were in. They have hundreds of varieties of fish in many large tanks. The largest goldfish they have are some comets of about six inches in body length. If anyone were to have the largest goldfish ever in captivity it would be Ohio Fish Rescue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is the largest \u201ccommon\u201d goldfish I have ever seen.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16428\"><img decoding=\"async\" width=\"661\" height=\"372\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Very-Large-Goldfish.jpeg\" alt=\"Very Large Goldfish\" class=\"wp-image-114303\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Very-Large-Goldfish.jpeg 661w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Very-Large-Goldfish-300x169.jpeg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Very-Large-Goldfish-150x84.jpeg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Very-Large-Goldfish-600x338.jpeg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Very-Large-Goldfish-441x248.jpeg 441w\" sizes=\"(max-width: 661px) 100vw, 661px\" \/><figcaption class=\"wp-element-caption\">Very Large Goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This common goldfish was grown for five years under ideal conditions in 200 gallon aquarium. It is about seven inches in body length. This is the largest size a common goldfish will normally grow to under ideal conditions. It is<strong>&nbsp;NOT<\/strong>&nbsp;one foot or fifteen inches.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The largest \u201cfancy\u201d goldfish is smaller in length but much larger in girth. Here is a photo of the largest we have seen in fancy goldfish:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\" id=\"attachment_32475\"><img decoding=\"async\" width=\"1024\" height=\"707\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-1024x707.jpg\" alt=\"Largest Fancy Goldfish\" class=\"wp-image-114301\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-1024x707.jpg 1024w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-300x207.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-150x104.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-600x414.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-768x530.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-990x683.jpg 990w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish-441x304.jpg 441w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Largest-Fancy-Goldfish.jpg 1204w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Largest Fancy Goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">And one has to love the folks on Facebook who don\u2019t seem to understand how Photoshop works. These photos of people holding two foot long goldfish are all Photo shopped images. They aren\u2019t real!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The few authentic photos are orange or gold colored fish with barbels and\/or a very concave forehead, which indicates they are some sort of koi\/carp\/goldfish hybrid. For instance the 6 pound \u201cgoldfish\u201d below from the news of December 8, 2020 has large barbels and is obviously a hybrid koi or carp. But the news reported it as a goldfish.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"322\" height=\"470\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Reuze-Goudvis.jpg\" alt=\"Reuze Goudvis\" class=\"wp-image-114299\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Reuze-Goudvis.jpg 322w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Reuze-Goudvis-300x438.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Reuze-Goudvis-150x219.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Reuze-Goudvis-206x300.jpg 206w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Reuze-Goudvis-103x150.jpg 103w\" sizes=\"(max-width: 322px) 100vw, 322px\" \/><figcaption class=\"wp-element-caption\">Reuze Goudvis<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Now this comes with a caveat. Some comet goldfish are six inches of body length and six inches of long flowing tail. These goldfish&nbsp;<strong>ARE<\/strong>&nbsp;a foot long. But they are the weight of a six inch fish, not the weight of a twelve inch fish. And weight is the determining factor in aquarium size requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Growth_Inhibiting_Hormones\"><\/span>Growth Inhibiting Hormones<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The inadvertent genetic selection by the Chinese with goldfish gave them a unique property. Goldfish do regulate their body size to the size of the container they are in. They do this with what are called growth inhibiting hormones (GIHs) or somatostatins (\u201cThe effects of somatostatin on serum growth hormone levels in the goldfish, Carassius auratus\u201d. Cook et al, 1984, \u201cThe influence of mammalian and teleost somatostatins on the secretion of growth hormone from goldfish [Carassius auratus L.] pituitary fragments in vitro,\u201d Marchant et. al., 1987, \u201cSomatostatin inhibits growth of rainbow trout,\u201d Very et. al., 2005, \u201cNeuroendocrine Regulation of Growth Hormone Secretion and Growth in Fish,\u201d Peng et. al. 1997)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When in small containers the goldfish produce these GIHs which reduce the amount of growth hormones produced and reduce the ability of the goldfish\u2019s body to digest food. In goldfish this can produce a goldfish which only gets a body length of three and a half inches, versus a pond raised goldfish body length of seven inches.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What people fail to realize that is that a seven inch fish is eight times heavier than a three and a half inch fish and produces eight times the waste. So the effect of these hormones is considerable.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16439\"><img decoding=\"async\" width=\"679\" height=\"449\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fantail-goldfish.jpg\" alt=\"Fantail goldfish\" class=\"wp-image-114297\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fantail-goldfish.jpg 679w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fantail-goldfish-300x198.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fantail-goldfish-150x99.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fantail-goldfish-600x397.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fantail-goldfish-441x292.jpg 441w\" sizes=\"(max-width: 679px) 100vw, 679px\" \/><figcaption class=\"wp-element-caption\">Fantail goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Now the question is is this GIH induced stunting painful or \u201cbad\u201d for the goldfish. One commentator on social media said:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201c<em>There is a rumor going around that they will grow the size of their tank and that\u2019s true, their growth is stunted and that will actually slowly kill them because their organs DON\u2019T stop growing. So its a slow and painful death for goldfish who are kept in small tanks<\/em>.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">This is just patently false and is typical of the misinformation spread about goldfish. The evidence shows that small, stunted goldfish are actually more resilient and longer-lived than those that are grown to be large sizes. They do&nbsp;<strong>NOT<\/strong>&nbsp;have organs which keep on growing!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is a photo of two forty year old goldfish:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16438\"><img decoding=\"async\" width=\"612\" height=\"406\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/40-year-old-goldfish.jpg\" alt=\"40 year old goldfish\" class=\"wp-image-114295\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/40-year-old-goldfish.jpg 612w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/40-year-old-goldfish-300x199.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/40-year-old-goldfish-150x100.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/40-year-old-goldfish-600x398.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/40-year-old-goldfish-441x293.jpg 441w\" sizes=\"(max-width: 612px) 100vw, 612px\" \/><figcaption class=\"wp-element-caption\">40 year old goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These two forty year old goldfish are very small and have no evidence of compressed organs or any health problems. They are in an obviously very small tank. They had been in an aquarium this small their entire life and did just fine. Saying that these 40 year old fish are the victims of animal cruelty is obviously a huge stretch for which there is absolutely no concrete evidence.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The longest lived nine goldfish in the world have all been small three and a half to four inch common goldfish which were in small five to ten gallon aquariums. One of these had no filter! These fish have lived to be over twenty and in three cases to be over forty years of age. (https:\/\/puregoldfish.com\/old\/, https:\/\/www.oldest.org\/animals\/goldfish\/)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Now the PETA folks say that goldfish dwarfed by growth inhibiting hormones only live a miserable short life of five to six years and that there is no evidence to the contrary. So the nine oldest living goldfish have spent their lives in small aquariums and all nine have been dwarfed by growth inhibiting hormones. But there is no evidence that goldfish can live long lives when dwarfed by hormones in a small aquarium? Huh???<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16441\"><img decoding=\"async\" width=\"499\" height=\"336\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Shubunkin-goldfish.jpg\" alt=\"Shubunkin goldfish\" class=\"wp-image-114293\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Shubunkin-goldfish.jpg 499w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Shubunkin-goldfish-300x202.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Shubunkin-goldfish-150x101.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Shubunkin-goldfish-441x297.jpg 441w\" sizes=\"(max-width: 499px) 100vw, 499px\" \/><figcaption class=\"wp-element-caption\">Shubunkin goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cStunting\u201d is a very incorrect description of the dwarfing process. Growth inhibiting hormones are a very natural process. Hormones in humans are what determines what height a person grows to. So do we describe a five foot person as \u201cstunted\u201d? Or predict that they are going to die a painful early death? A more accurate term would be \u201chormone dwarfing\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Note that the growth inhibiting hormones (GIHs) are&nbsp;<strong>NOT<\/strong>&nbsp;found in the water of the aquarium and are&nbsp;<strong>NOT<\/strong>&nbsp;affected by water changes. These are very complex unstable hormones with structures that have a chemical half life of only two to three minutes. GIHs only exist in the bloodstream of a given fish. One will&nbsp;<strong>NEVER<\/strong>&nbsp;find growth inhibiting hormones in the water of the aquarium.&nbsp;<strong>NEVER<\/strong>!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">GIHs are produced by glands in the fish in response to the size of the tank they are in. The hormones are produced in incredibly small quantities and fed into the fish\u2019s bloodstream. Other glands respond with other hormones and together these hormones prevent that fish and&nbsp;<strong>ONLY<\/strong>&nbsp;that fish from growing. Ten minutes after they are put into the fish\u2019s bloodstream the GIHs are gone, decomposed. So the GIHs never get into the water at all. So a water change&nbsp; will have absolutely no effect on these hormone levels. And the growth inhibiting hormone level in one fish will have absolutely no effect on any other fish.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16440\"><img decoding=\"async\" width=\"489\" height=\"403\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Lionhead-goldfish.jpg\" alt=\"Lionhead goldfish\" class=\"wp-image-114291\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Lionhead-goldfish.jpg 489w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Lionhead-goldfish-300x247.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Lionhead-goldfish-150x124.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Lionhead-goldfish-441x363.jpg 441w\" sizes=\"(max-width: 489px) 100vw, 489px\" \/><figcaption class=\"wp-element-caption\">Lionhead goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Note also that this hormone dwarfing is not a guaranteed process. Sometimes a goldfish in a small ten gallon tank will still grow to 6 inches in body length. The genetics of each fish varies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also this hormone dwarfing is reversible in most cases. A goldfish which has been kept in a small aquarium for say four years and then is put in a large aquarium can have a growth spurt and get almost as large as they would have been if they had been in the large tank all along.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_40813\"><img decoding=\"async\" width=\"827\" height=\"566\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Common-Goldfish-1.jpg\" alt=\"Common Goldfish\" class=\"wp-image-114289\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Common-Goldfish-1.jpg 827w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Common-Goldfish-1-300x205.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Common-Goldfish-1-150x103.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Common-Goldfish-1-600x411.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Common-Goldfish-1-768x526.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Common-Goldfish-1-441x302.jpg 441w\" sizes=\"(max-width: 827px) 100vw, 827px\" \/><figcaption class=\"wp-element-caption\">Common Goldfish<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Darwins_%E2%80%9CSurvival_of_the_Fittest%E2%80%9D\"><\/span>Darwin\u2019s \u201cSurvival of the Fittest\u201d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The explanation for the way that goldfish grow to the size of their container has to do with simple evolution. The Crucian carp from which goldfish are descended has an interesting trait. In large lakes it averages some six inches in body length. While in small ponds it averages four inches in body length. This natural adaption has been built on by the goldfish because of inadvertent selective breeding by the Chinese.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Chinese both raised goldfish in ponds and they raised them inside in small earthenware containers. For some years a goldfish strain might be raised in a pond where the biggest fish had the best chance of survival. Then that strain might be raised inside in small containers where the smaller fish stood the best chance of survival.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A given strain might move back and forth many times. So goldfish strains which grew large in ponds and grew small in small containers evolved though \u201cinadvertent genetic selection\u201d. This is actually a classic example of how evolution works.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The ability of goldfish to grow to the size of their containers is unique among aquarium fish. But then only goldfish have had humans breeding them for such a long period of time. Perhaps in 500 years all aquarium fish will have this ability.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16437\"><img decoding=\"async\" width=\"501\" height=\"346\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Comet-goldfish.jpg\" alt=\"Comet goldfish\" class=\"wp-image-114287\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Comet-goldfish.jpg 501w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Comet-goldfish-300x207.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Comet-goldfish-150x104.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Comet-goldfish-441x305.jpg 441w\" sizes=\"(max-width: 501px) 100vw, 501px\" \/><figcaption class=\"wp-element-caption\">Comet goldfish<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Growth_Rate_of_Goldfish\"><\/span>Growth Rate of Goldfish<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Baby and juvenile goldfish&nbsp;<strong>CAN<\/strong>&nbsp;be a dirty fish if fed a lot of food frequently.&nbsp; They can also be a very clean fish if only fed sparingly. Adult goldfish are&nbsp;<strong>NOT<\/strong>&nbsp;dirty and eat pound for pound the same as any other adult fish.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What is difficult for people to wrap their heads around is that cold blooded creatures do not have the timetable growth of warm blooded creatures.&nbsp; A human male will stop growing at roughly 18 years of age, pretty much regardless of diet. A cold blooded creature doesn\u2019t grow to a timetable like that.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most juvenile fish only eat 3 to 4% of their weight per day till they reach adulthood. But a juvenile goldfish can eat 15% of its weight per day if fed often. If a baby goldfish is fed ten times a day at 15% of its weight per day it will grow to roughly six inches in three to five months in a large tank.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\" id=\"attachment_40815\"><img decoding=\"async\" width=\"885\" height=\"667\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish2-1.jpg\" alt=\"Fancy Goldfish\" class=\"wp-image-114285\" style=\"width:885px;height:auto\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish2-1.jpg 885w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish2-1-300x226.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish2-1-150x113.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish2-1-600x452.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish2-1-768x579.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish2-1-441x332.jpg 441w\" sizes=\"(max-width: 885px) 100vw, 885px\" \/><figcaption class=\"wp-element-caption\">Fancy Goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If this same goldfish is fed 3% of its weight per day of the same food it will take two to three years to reach only slightly less than six inches in body length (a limited diet will have a small effect on the size of cold blooded creatures but not much). Both fish will look identical and both will slow their growth (and their eating!) considerably at six inches. Both fish will then grow slowly to maybe seven inches. (Reference papers Grayton and Beamish, 1977; Marian et al., 1981; Jobling, 1983; Charles et al., 1984; Wang et al., 1998, Cui, 1989, Grayton and Beamish, 1977; Sampath, 1984).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is what has resulted in the concept that goldfish are a \u201cdirty\u201d fish. If fed heavily they will eat heavily&nbsp;<strong>INITIALLY.<\/strong>&nbsp;And a fish which eats three to five times what any other \u201cnormal\u201d fish eats will obviously defecate three to five times more feces. Thus the \u201cdirty fish\u201d reputation. Adult goldfish stop eating like pigs and things settle down.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_16436\"><img decoding=\"async\" width=\"498\" height=\"357\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Moor-Goldfish.jpg\" alt=\"Black Moor Goldfish\" class=\"wp-image-114283\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Moor-Goldfish.jpg 498w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Moor-Goldfish-300x215.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Moor-Goldfish-150x108.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Black-Moor-Goldfish-441x316.jpg 441w\" sizes=\"(max-width: 498px) 100vw, 498px\" \/><figcaption class=\"wp-element-caption\">Black Moor Goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This ability of small juvenile goldfish to eat and absorb much more food than any other fish is part of the reason they make such a good beginner fish. Beginners almost always overfeed all aquarium fish. When a beginner does this with most fish the uneaten foods rots and creates huge health problems with the fish (most cases of \u201cnew tank syndrome\u201d are from overfeeding and the resulting bacterial explosion). With juvenile goldfish they just eat all the food put in and there is no problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Now we probably shouldn\u2019t say \u201cno problem\u201d. Fish which are fed more do grow faster but they also tend to have more disease. Whether this is due directly to the fast growth or is due to higher bioload in the aquarium is unclear and unimportant. But one shouldn\u2019t feed goldfish very much food. Fast growth rate is not desirable. One of the common denominators of the very long lived goldfish mentioned above was that their owners only fed them very lightly.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_40816\"><img decoding=\"async\" width=\"927\" height=\"627\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Oranda-Fancy-Goldfish-1.jpg\" alt=\"Oranda Fancy Goldfish\" class=\"wp-image-114279\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Oranda-Fancy-Goldfish-1.jpg 927w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Oranda-Fancy-Goldfish-1-300x203.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Oranda-Fancy-Goldfish-1-150x101.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Oranda-Fancy-Goldfish-1-600x406.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Oranda-Fancy-Goldfish-1-768x519.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Oranda-Fancy-Goldfish-1-441x298.jpg 441w\" sizes=\"(max-width: 927px) 100vw, 927px\" \/><figcaption class=\"wp-element-caption\">Oranda Fancy Goldfish<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Small goldfish should only be fed about 2% to 4% of their weight in dry commercial fish food per day. This means two small three inch goldfish which might weigh ten grams total should only be fed about 0.2 to 0.4 grams of food per day. This is a&nbsp;<strong>VERY<\/strong>&nbsp;small amount of food.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Adult narrow bodied goldfish are a sleek fish which eats the same amount of food per day as any typical fish of the same body length (1% of body weight). So an adult narrow bodied goldfish creates just as much but not more waste than any other aquarium fish.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Note that all fish are not like goldfish. Loaches grow slowly their entire life. Tilapia are like goldfish and grow to a relatively set size very rapidly if well fed. Most fish species lie somewhere in between these two extremes.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\" id=\"attachment_25811\"><img decoding=\"async\" width=\"1024\" height=\"684\" src=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2.jpg\" alt=\"Fancy Goldfish\" class=\"wp-image-114281\" srcset=\"https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2.jpg 1024w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2-300x200.jpg 300w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2-150x100.jpg 150w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2-600x401.jpg 600w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2-768x513.jpg 768w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2-990x661.jpg 990w, https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Fancy-Goldfish-2-441x295.jpg 441w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Fancy Goldfish<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Further_Articles_on_Goldfish\"><\/span>Further Articles on Goldfish<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For those wanting to delve deeper into keeping goldfish one can go to the following links:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1751_Types_of_Goldfish\"><\/span><a href=\"https:\/\/aquainfo.nl\/en\/17-5-1-types-of-goldfish\/\">17.5.1. Types of Goldfish<\/a><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1753_Stocking_Goldfish\"><\/span><a href=\"https:\/\/aquainfo.nl\/en\/17-5-3-stocking-goldfish\/\" data-type=\"link\" data-id=\"https:\/\/aquainfo.nl\/en\/17-5-3-stocking-goldfish\/\">17.5.3. Stocking Goldfish<\/a><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1754_Goldfish_Care\"><\/span><a href=\"https:\/\/aquainfo.nl\/en\/17-5-4-goldfish-care\/\" data-type=\"link\" data-id=\"https:\/\/aquainfo.nl\/en\/17-5-4-goldfish-care\/\">17.5.4. Goldfish Care<\/a><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-startpagina-aquariumscience\"><a href=\"\/?cat_ID=55102\" data-type=\"link\" data-id=\"https:\/\/aquainfo.nl\/en\/category\/aquariumscience-en\/\">Startpage Aquariumscience<\/a><\/h2>\n\n\n<nav style=\"color: #005d94;background-color: #f4f9fd\" class=\"has-text-color has-background has-medium-font-size is-vertical wp-block-navigation is-layout-flex wp-container-core-navigation-is-layout-8cdb3485 wp-block-navigation-is-layout-flex\" aria-label=\"AquariumScience - Engels\"><ul style=\"color: #005d94;background-color: #f4f9fd\" class=\"wp-block-navigation__container has-text-color has-background has-medium-font-size is-vertical wp-block-navigation\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/1-aquarium-basics\/\"><span class=\"wp-block-navigation-item__label\">1. Aquarium Basics<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"1. Aquarium Basics submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/1-2-falsehoods-and-myths\/\"><span class=\"wp-block-navigation-item__label\">1.2. Falsehoods and Myths<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/1-3-false-marketing-claims\/\"><span class=\"wp-block-navigation-item__label\">1.3. False marketing claims<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/1-4-sources-of-data\/\"><span class=\"wp-block-navigation-item__label\">1.4. Sources of data<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"1.4. Sources of data submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/1-4-1-facebook-fake-accounts\/\"><span class=\"wp-block-navigation-item__label\">1.4.1. Facebook Fake Accounts<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/1-5-aquarium-options\/\"><span class=\"wp-block-navigation-item__label\">1.5. Aquarium options<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/1-6-aquarium-fast-fish-deaths\/\"><span class=\"wp-block-navigation-item__label\">1.6. Aquarium Fast Fish Deaths<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/1-7-aquarium-slow-fish-deaths\/\"><span class=\"wp-block-navigation-item__label\">1.7. Aquarium Slow Fish Deaths<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/2-aquarium-cycling\/\"><span class=\"wp-block-navigation-item__label\">2. Aquarium Cycling<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"2. Aquarium Cycling submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-1-fish-less-cycling\/\"><span class=\"wp-block-navigation-item__label\">2.1. Fish less cycling<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-2-many-ways-to-cycle\/\"><span class=\"wp-block-navigation-item__label\">2.2. Many Ways to Cycle<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-3-how-i-cycle-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">2.3. How I Cycle an aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-4-cycling-an-aquarium-with-ammonia\/\"><span class=\"wp-block-navigation-item__label\">2.4. Cycling an Aquarium with Ammonia<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/2-5-aquarium-fish-in-cycling\/\"><span class=\"wp-block-navigation-item__label\">2.5. Aquarium Fish-in Cycling<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"2.5. Aquarium Fish-in Cycling submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-5-2-rapid-fish-in-cycling\/\"><span class=\"wp-block-navigation-item__label\">2.5.2. Rapid Fish-in Cycling<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-6-not-cycling-an-aquarium-at-all\/\"><span class=\"wp-block-navigation-item__label\">2.6. Not Cycling an Aquarium at All<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-7-new-tank-syndrome\/\"><span class=\"wp-block-navigation-item__label\">2.7. New Tank-syndrome<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/2-8-bacteria-in-a-bottle\/\"><span class=\"wp-block-navigation-item__label\">2.8. Bacteria-in-a-bottle<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"2.8. Bacteria-in-a-bottle submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-8-1-bacteria-in-a-bottle-in-depth\/\"><span class=\"wp-block-navigation-item__label\">2.8.1. Bacteria in a Bottle in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-8-2-sludge-removing-bacteria-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">2.8.2. Sludge Removing Bacteria in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-9-instant-cycling-chemicals-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">2.9. Instant Cycling Chemicals for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-10-nitrogen-cycle\/\"><span class=\"wp-block-navigation-item__label\">2.10. Nitrogen Cycle<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-11-inoculate-for-cycling\/\"><span class=\"wp-block-navigation-item__label\">2.11. Inoculate for Cycling<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-12-beneficial-bacteria\/\"><span class=\"wp-block-navigation-item__label\">2.12. Beneficial Bacteria<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-13-cycling-test\/\"><span class=\"wp-block-navigation-item__label\">2.13. Cycling Test<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-14-the-mature-aquarium\/\"><span class=\"wp-block-navigation-item__label\">2.14. The Mature Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/2-15-cycling-a-planted-aquarium\/\"><span class=\"wp-block-navigation-item__label\">2.15. Cycling a Planted Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/3-fish-food\/\"><span class=\"wp-block-navigation-item__label\">3. Fish Food<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"3. Fish Food submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-1-insignificance-of-food\/\"><span class=\"wp-block-navigation-item__label\">3.1. Insignificance of Food<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-2-fish-diet-specializations\/\"><span class=\"wp-block-navigation-item__label\">3.2. Fish Diet Specializations<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-3-amount-of-fish-food\/\"><span class=\"wp-block-navigation-item__label\">3.3. Amount of Fish Food<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-4-gel-fish-food\/\"><span class=\"wp-block-navigation-item__label\">3.4. Gel Fish Food<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-5-breaking-up-fish-food-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">3.5. Breaking Up Fish Food in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-6-dry-fish-food\/\"><span class=\"wp-block-navigation-item__label\">3.6. Dry Fish Food<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-7-banned-fish-food\/\"><span class=\"wp-block-navigation-item__label\">3.7. Banned Fish Food<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-8-fish-food-and-malawi-bloat\/\"><span class=\"wp-block-navigation-item__label\">3.8. Fish Food and Malawi Bloat<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/3-9-fish-food-and-gunk\/\"><span class=\"wp-block-navigation-item__label\">3.9. Fish Food and Gunk<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/4-temperature-ph-kh-and-gh\/\"><span class=\"wp-block-navigation-item__label\">4. Temperature, pH, KH and GH<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"4. Temperature, pH, KH and GH submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-1-importance-of-water-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.1. Importance of Water in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-2-aquarium-temperatures\/\"><span class=\"wp-block-navigation-item__label\">4.2. Aquarium temperatures<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-3-free-floating-bacteria-in-aquariums\/\"><span class=\"wp-block-navigation-item__label\">4.3. Free Floating Bacteria in Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/4-4-aquarium-ph\/\"><span class=\"wp-block-navigation-item__label\">4.4. Aquarium pH<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"4.4. Aquarium pH submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-4-1-aquarium-ph-is-not-important\/\"><span class=\"wp-block-navigation-item__label\">4.4.1. Aquarium pH is Not Important<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-4-2-buffering-aquarium-water\/\"><span class=\"wp-block-navigation-item__label\">4.4.2. Buffering Aquarium Water<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-4-3-carbon-dioxide-and-ph-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.4.3. \u00a0Carbon Dioxide and pH in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-4-4-dropping-ph-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.4.4. Dropping pH in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-4-5-raising-ph-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.4.5. Raising pH in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/4-5-water-hardness-gh-and-kh-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.5. Water Hardness, GH and KH in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"4.5. Water Hardness, GH and KH in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-5-1-general-hardness\/\"><span class=\"wp-block-navigation-item__label\">4.5.1. General Hardness<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/4-5-2-carbonate-hardness-kh-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.5.2. Carbonate Hardness, KH in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"4.5.2. Carbonate Hardness, KH in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-5-2-1-kh-and-cycling-in-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.5.2.1. KH and Cycling in an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/4-6-salts-in-the-water-of-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.6. Salts in the Water of an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"4.6. Salts in the Water of an Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-6-1-trace-additives-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.6.1. Trace Additives for the aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-7-fish-tolerance-to-ph\/\"><span class=\"wp-block-navigation-item__label\">4.7. Fish Tolerance to pH<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/4-8-stability-isnt-important\/\"><span class=\"wp-block-navigation-item__label\">4.8. \u201cStability\u201d isn\u2019t Important<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"4.8. \u201cStability\u201d isn\u2019t Important submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-8-1-rapid-thermal-and-ph-shifts-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.8.1. Rapid Thermal and pH Shifts in the aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-9-un-bagging-fish-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.9. Un-bagging Fish for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-10-orp-or-redox-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">4.10. ORP or Redox in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/4-11-tank-syndromes\/\"><span class=\"wp-block-navigation-item__label\">4.11. Tank Syndromes<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/5-ammonia-nitrite-nitrate-and-chlorine\/\"><span class=\"wp-block-navigation-item__label\">5. Ammonia, Nitrite, Nitrate and Chlorine<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"5. Ammonia, Nitrite, Nitrate and Chlorine submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/5-2-safe-ammonia-levels\/\"><span class=\"wp-block-navigation-item__label\">5.2. Safe Ammonia Levels<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"5.2. Safe Ammonia Levels submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-2-1-ammonia-in-the-aquarium-in-depth\/\"><span class=\"wp-block-navigation-item__label\">5.2.1. Ammonia in the Aquarium in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-2-3-high-ammonia-spikes-in-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">5.2.3. High Ammonia Spikes in an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/5-3-safe-nitrite-levels\/\"><span class=\"wp-block-navigation-item__label\">5.3. Safe Nitrite Levels<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"5.3. Safe Nitrite Levels submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-3-2-safe-nitrite-levels-in-the-aquarium-in-more-depth\/\"><span class=\"wp-block-navigation-item__label\">5.3.2. Safe Nitrite Levels in the Aquarium in More Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/5-4-safe-nitrate-levels\/\"><span class=\"wp-block-navigation-item__label\">5.4. Safe Nitrate Levels<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"5.4. Safe Nitrate Levels submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-4-1-nitrate-in-depth\/\"><span class=\"wp-block-navigation-item__label\">5.4.1. Nitrate in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/5-5-chlorine-and-chloramine\/\"><span class=\"wp-block-navigation-item__label\">5.5. Chlorine and Chloramine<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"5.5. Chlorine and Chloramine submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-1-chlorination-in-the-aquarium-in-depth\/\"><span class=\"wp-block-navigation-item__label\">5.5.1. Chlorination in the Aquarium in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/5-5-2-chloramines-in-aquarium-water\/\"><span class=\"wp-block-navigation-item__label\">5.5.2. Chloramines in Aquarium Water<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"5.5.2. Chloramines in Aquarium Water submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-2-1-ammonia-in-chloramine-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">5.5.2.1. Ammonia in Chloramine in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/5-5-3-aquarium-water-conditioners\/\"><span class=\"wp-block-navigation-item__label\">5.5.3. Aquarium Water Conditioners<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"5.5.3. Aquarium Water Conditioners submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-3-1-ammonia-detoxifying-chemicals-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">5.5.3.1. Ammonia Detoxifying Chemicals in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-3-2-seachem-prime-and-seachem-safe\/\"><span class=\"wp-block-navigation-item__label\">5.5.3.2. Seachem Prime and Seachem Safe<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-3-3-conditioner-chemistry\/\"><span class=\"wp-block-navigation-item__label\">5.5.3.3. Conditioner Chemistry<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-3-4-cost-of-conditioners\/\"><span class=\"wp-block-navigation-item__label\">5.5.3.4. Cost of Conditioners<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-3-5-conditioner-testing\/\"><span class=\"wp-block-navigation-item__label\">5.5.3.5. Conditioner Testing<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-3-6-review-of-water-conditioners-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">5.5.3.6. Review of Water Conditioners for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/5-5-4-stress-coat-products\/\"><span class=\"wp-block-navigation-item__label\">5.5.4. Stress Coat Products<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/6-filtration\/\"><span class=\"wp-block-navigation-item__label\">6. Filtration<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"6. Filtration submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/6-1-mechanical-filtration\/\"><span class=\"wp-block-navigation-item__label\">6.1. Mechanical Filtration<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"6.1. Mechanical Filtration submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-1-1-cleaned-mechanical-filtration\/\"><span class=\"wp-block-navigation-item__label\">6.1.1. Cleaned Mechanical Filtration<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-1-2-uncleaned-mechanical-filtration\/\"><span class=\"wp-block-navigation-item__label\">6.1.2. Uncleaned Mechanical Filtration<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/6-2-biofiltration\/\"><span class=\"wp-block-navigation-item__label\">6.2. Biofiltration<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"6.2. Biofiltration submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-2-1-detritus-explained\/\"><span class=\"wp-block-navigation-item__label\">6.2.1. Detritus Explained<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-2-2-brown-gunk\/\"><span class=\"wp-block-navigation-item__label\">6.2.2. Brown Gunk<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-2-3-cloudy-water\/\"><span class=\"wp-block-navigation-item__label\">6.2.3. Cloudy Water<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-3-over-filtration-in-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">6.3. Over-filtration in an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/6-4-crystal-clear-water\/\"><span class=\"wp-block-navigation-item__label\">6.4. Crystal-Clear Water<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"6.4. Crystal-Clear Water submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-4-1-crystal-clear-water-in-depth\/\"><span class=\"wp-block-navigation-item__label\">6.4.1. Crystal-Clear Water in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-4-2-polishing-filtration-in-an-aquarium-filter\/\"><span class=\"wp-block-navigation-item__label\">6.4.2. Polishing Filtration in an Aquarium Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/6-5-water-flow-rate-in-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">6.5. Water Flow Rate in Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"6.5. Water Flow Rate in Aquarium Filters submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-5-1-function-of-flow-in-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">6.5.1. Function of Flow in an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-5-2-substrate-as-a-filter\/\"><span class=\"wp-block-navigation-item__label\">6.5.2. Substrate as a Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-6-aquaponic-filtration\/\"><span class=\"wp-block-navigation-item__label\">6.6. Aquaponic Filtration<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-7-nitrate-factory\/\"><span class=\"wp-block-navigation-item__label\">6.7. Nitrate Factory<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/6-8-thorough-cleaning-a-filter\/\"><span class=\"wp-block-navigation-item__label\">6.8. Thorough Cleaning a Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"6.8. Thorough Cleaning a Filter submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-8-1-filter-cleaning-tests\/\"><span class=\"wp-block-navigation-item__label\">6.8.1. Filter Cleaning Tests<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/6-9-tap-water-rinsing\/\"><span class=\"wp-block-navigation-item__label\">6.9. Tap Water Rinsing<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/7-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7. Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"7. Filter Media submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/7-1-review-of-aquarium-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.1. Review of Aquarium Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"7.1. Review of Aquarium Filter Media submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-1-1-cost-of-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.1.1. Cost of Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-1-2-the-function-of-aquarium-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.1.2. The Function of Aquarium Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/7-1-3-aquarium-filter-media-tests\/\"><span class=\"wp-block-navigation-item__label\">7.1.3. Aquarium Filter Media Tests<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"7.1.3. Aquarium Filter Media Tests submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-1-3-1-ammonia-oxidizing-test\/\"><span class=\"wp-block-navigation-item__label\">7.1.3.1. Ammonia Oxidizing Test<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-1-3-2-water-clarity-test-of-aquarium-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.1.3.2. Water Clarity Test of Aquarium Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/7-2-individual-media-list\/\"><span class=\"wp-block-navigation-item__label\">7.2. Individual Media List<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"7.2. Individual Media List submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-1-polyester-floss\/\"><span class=\"wp-block-navigation-item__label\">7.2.1. Polyester Floss<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-2-foam-media\/\"><span class=\"wp-block-navigation-item__label\">7.2.2. Foam Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-3-k1-media\/\"><span class=\"wp-block-navigation-item__label\">7.2.3. K1 Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-4-pumice-perlite\/\"><span class=\"wp-block-navigation-item__label\">7.2.4. Pumice Perlite<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-5-aquarium-gravel\/\"><span class=\"wp-block-navigation-item__label\">7.2.5. Aquarium Gravel<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-6-pp-eva-pads-for-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">7.2.6. PP EVA Pads for Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-7-bio-balls-aquarium-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.2.7. Bio Balls Aquarium Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-8-pot-scrubbers-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">7.2.8. Pot Scrubbers in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-9-lava-rock-for-aquarium-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.2.9. Lava Rock for Aquarium Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-10-growstone\/\"><span class=\"wp-block-navigation-item__label\">7.2.10. Growstone<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-11-ceramic-media-in-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">7.2.11. Ceramic Media in Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-12-seachem-matrix-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.2.12. Seachem Matrix filter media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-13-clay-balls\/\"><span class=\"wp-block-navigation-item__label\">7.2.13. Clay Balls<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-2-14-biohome-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.2.14. BioHome Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-3-calculating-filter-media-volume-requirements\/\"><span class=\"wp-block-navigation-item__label\">7.3. Calculating Filter Media Volume Requirements<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/7-4-chemical-filtration-media-in-the-aquarium-filter\/\"><span class=\"wp-block-navigation-item__label\">7.4. Chemical Filtration Media in the Aquarium Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"7.4. Chemical Filtration Media in the Aquarium Filter submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-4-2-activated-carbon-in-an-aquarium-filter\/\"><span class=\"wp-block-navigation-item__label\">7.4.2. Activated Carbon in an Aquarium Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-4-3-ion-exchange-resins-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">7.4.3. Ion-Exchange Resins in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-4-4-zeolite-ammonia-removing-granules-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">7.4.4. Zeolite Ammonia Removing Granules in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-4-5-phosphate-removing-granules-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">7.4.5. Phosphate Removing Granules for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-4-6-purigen-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">7.4.6. Purigen in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-4-7-poly-filter-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">7.4.7. Poly-Filter in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-5-denitrifying-media-biohome-and-denitrate-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">7.5. Denitrifying Media, Biohome and De*Nitrate in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/7-6-the-surface-area-requirements-for-aquarium-filter-media\/\"><span class=\"wp-block-navigation-item__label\">7.6. The Surface Area Requirements for Aquarium Filter Media<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/8-review-of-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">8. Review of Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"8. Review of Aquarium Filters submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/8-1-review-of-aquarium-filters-in-depth\/\"><span class=\"wp-block-navigation-item__label\">8.1. Review of Aquarium Filters in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"8.1. Review of Aquarium Filters in Depth submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-1-1-aquarium-filter-test\/\"><span class=\"wp-block-navigation-item__label\">8.1.1. Aquarium Filter Test<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-2-hang-on-back-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">8.2. Hang On Back Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/8-3-aquarium-canister-filters\/\"><span class=\"wp-block-navigation-item__label\">8.3. Aquarium Canister Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"8.3. Aquarium Canister Filters submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-3-1-aquarium-canister-filters-in-depth\/\"><span class=\"wp-block-navigation-item__label\">8.3.1. Aquarium Canister Filters in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-3-2-do-it-yourself-canister-filters\/\"><span class=\"wp-block-navigation-item__label\">8.3.2. Do-it-yourself Canister Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-3-3-fx-series-canister-filters\/\"><span class=\"wp-block-navigation-item__label\">8.3.3. FX Series Canister Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-4-aquarium-sponge-filters\/\"><span class=\"wp-block-navigation-item__label\">8.4. Aquarium Sponge Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/8-5-under-gravel-filters\/\"><span class=\"wp-block-navigation-item__label\">8.5. Under Gravel Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"8.5. Under Gravel Filters submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-5-1-under-gravel-aquarium-filters-in-depth\/\"><span class=\"wp-block-navigation-item__label\">8.5.1. Under-Gravel Aquarium Filters in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-5-2-diy-undergravel-filter\/\"><span class=\"wp-block-navigation-item__label\">8.5.2. DIY Undergravel Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/8-6-sump-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">8.6. Sump Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"8.6. Sump Aquarium Filters submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-6-1-sump-aquarium-filters-in-depth\/\"><span class=\"wp-block-navigation-item__label\">8.6.1. Sump Aquarium Filters in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-6-2-designing-an-aquarium-static-sump-filter\/\"><span class=\"wp-block-navigation-item__label\">8.6.2. Designing an Aquarium Static Sump Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-6-3-trickle-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">8.6.3. Trickle Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-6-4-wet-dry-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">8.6.4. Wet-Dry Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-6-5-fluidized-bed-sump-filters-for-aquariums\/\"><span class=\"wp-block-navigation-item__label\">8.6.5. Fluidized Bed Sump Filters for Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-6-6-do-it-yourself-sump-filters-for-aquariums\/\"><span class=\"wp-block-navigation-item__label\">8.6.6. Do-it-yourself Sump Filters for Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-6-7-foam-sump\/\"><span class=\"wp-block-navigation-item__label\">8.6.7. Foam Sump<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/8-7-other-filters\/\"><span class=\"wp-block-navigation-item__label\">8.7. Other Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"8.7. Other Filters submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-1-sand-filters\/\"><span class=\"wp-block-navigation-item__label\">8.7.1. Sand Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-2-high-performance-filters-for-aquariums\/\"><span class=\"wp-block-navigation-item__label\">8.7.2. \u201cHigh Performance\u201d Filters for Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-3-hamburg-matten-aquarium-filter\/\"><span class=\"wp-block-navigation-item__label\">8.7.3. Hamburg Matten Aquarium Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-4-aquarium-diatomaceous-earth-filters\/\"><span class=\"wp-block-navigation-item__label\">8.7.4. Aquarium Diatomaceous Earth Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-5-do-it-yourself-aquarium-bottle-filters\/\"><span class=\"wp-block-navigation-item__label\">8.7.5. Do it yourself Aquarium Bottle Filters.<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-6-small-filters-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">8.7.6. Small Filters for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-7-bottom-of-the-tank-matten\/\"><span class=\"wp-block-navigation-item__label\">8.7.7. Bottom of the Tank Matten<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-7-8-small-diy-aquarium-filters\/\"><span class=\"wp-block-navigation-item__label\">8.7.8. Small DIY Aquarium Filters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-8-filter-and-media-design-for-aquariums\/\"><span class=\"wp-block-navigation-item__label\">8.8. Filter and Media Design for Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/8-9-anaerobic-or-anoxic-reactors-as-an-aquarium-filter\/\"><span class=\"wp-block-navigation-item__label\">8.9. Anaerobic or Anoxic Reactors as an Aquarium Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"8.9. Anaerobic or Anoxic Reactors as an Aquarium Filter submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-9-1-biocenosis-reactor\/\"><span class=\"wp-block-navigation-item__label\">8.9.1. Biocenosis Reactor<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-9-2-a-feasible-reactor-for-doing-anoxic-aquarium-filtration\/\"><span class=\"wp-block-navigation-item__label\">8.9.2. A Feasible Reactor for doing Anoxic Aquarium Filtration<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/8-9-3-assimilatory-denitrification\/\"><span class=\"wp-block-navigation-item__label\">8.9.3. Assimilatory Denitrification<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/9-aeration-of-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">9. Aeration of an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"9. Aeration of an Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/9-1-aeration-in-depth\/\"><span class=\"wp-block-navigation-item__label\">9.1. Aeration in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/9-2-turbulence-and-aeration-in-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">9.2. Turbulence and Aeration in an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/9-3-airstone-aeration-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">9.3. Airstone Aeration in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"9.3. Airstone Aeration in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/9-3-2-cleaning-aquarium-air-stones\/\"><span class=\"wp-block-navigation-item__label\">9.3.2. Cleaning Aquarium Air Stones<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/9-4-skimmers-and-spray-bars-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">9.4. Skimmers and Spray Bars in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/9-5-aquarium-aeration-and-temperature\/\"><span class=\"wp-block-navigation-item__label\">9.5. Aquarium Aeration and Temperature<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/10-diseases\/\"><span class=\"wp-block-navigation-item__label\">10. Diseases<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"10. Diseases submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-1-aquarium-diseases-in-general\/\"><span class=\"wp-block-navigation-item__label\">10.1. Aquarium Diseases in General<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/10-2-skin-protozoans\/\"><span class=\"wp-block-navigation-item__label\">10.2. Skin Protozoans<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"10.2. Skin Protozoans submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/10-2-2-ich-in-far-more-depth\/\"><span class=\"wp-block-navigation-item__label\">10.2.2. Ich in far more depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"10.2.2. Ich in far more depth submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-2-1-ich-in-depth\/\"><span class=\"wp-block-navigation-item__label\">10.2.2.1. Ich in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-2-2-ich-immunity\/\"><span class=\"wp-block-navigation-item__label\">10.2.2.2. Ich Immunity<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-2-3-ich-medication\/\"><span class=\"wp-block-navigation-item__label\">10.2.2.3. Ich Medication<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-2-4-ich-medications-in-more-depth\/\"><span class=\"wp-block-navigation-item__label\">10.2.2.4. Ich Medications in More Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-2-5-ineffective-ich-medications\/\"><span class=\"wp-block-navigation-item__label\">10.2.2.5. Ineffective Ich Medications<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-2-6-filtration-of-ich\/\"><span class=\"wp-block-navigation-item__label\">10.2.2.6. Filtration of Ich<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-2-7-ich-and-heat\/\"><span class=\"wp-block-navigation-item__label\">10.2.2.7. Ich and Heat<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-3-velvet-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.2.3. Velvet in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-4-epistylis-on-a-fish\/\"><span class=\"wp-block-navigation-item__label\">10.2.4. Epistylis on a Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-5-chilodonella-and-costia\/\"><span class=\"wp-block-navigation-item__label\">10.2.5. Chilodonella and Costia<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-6-tetrahymena\/\"><span class=\"wp-block-navigation-item__label\">10.2.6. Tetrahymena<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-2-7-cryptobia-in-fish\/\"><span class=\"wp-block-navigation-item__label\">10.2.7. Cryptobia in Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/10-3-bacterial-infections-in-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3. Bacterial Infections in Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"10.3. Bacterial Infections in Fish submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-1-skin-ulcers-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3.1. Skin Ulcers in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-2-mouth-rot-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3.2. Mouth Rot in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-3-duck-lips-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3.3. Duck Lips in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-4-fin-rot-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3.4. Fin Rot in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-5-saddleback-in-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3.5. Saddleback in Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-6-red-blotches-or-septicemia-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3.6. Red Blotches or Septicemia in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-7-white-eyes\/\"><span class=\"wp-block-navigation-item__label\">10.3.7. White Eyes<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-8-popeye\/\"><span class=\"wp-block-navigation-item__label\">10.3.8. Popeye<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-9-red-gills\/\"><span class=\"wp-block-navigation-item__label\">10.3.9. Red Gills<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-10-red-mouth-in-goldfish\/\"><span class=\"wp-block-navigation-item__label\">10.3.10. Red Mouth in Goldfish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-3-11-treating-bacterial-diseases-in-fish\/\"><span class=\"wp-block-navigation-item__label\">10.3.11. Treating Bacterial Diseases in Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/10-4-fish-tuberculosis\/\"><span class=\"wp-block-navigation-item__label\">10.4. Fish Tuberculosis<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"10.4. Fish Tuberculosis submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-4-1-fish-tb-in-depth\/\"><span class=\"wp-block-navigation-item__label\">10.4.1. Fish TB in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-5-hexamita-in-fish\/\"><span class=\"wp-block-navigation-item__label\">10.5. Hexamita in fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-6-flukes\/\"><span class=\"wp-block-navigation-item__label\">10.6. Flukes<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-7-fish-saprolegnia-or-fish-fungus\/\"><span class=\"wp-block-navigation-item__label\">10.7. Fish Saprolegnia or \u201cFish Fungus\u201d<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-8-lymphocystis-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.8. Lymphocystis in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-9-anchor-worms\/\"><span class=\"wp-block-navigation-item__label\">10.9. Anchor Worms<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-10-black-spots-on-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.10. Black Spots on Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-11-tapeworms-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.11. Tapeworms in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/10-12-nematodes-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.12. Nematodes in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"10.12. Nematodes in Aquarium Fish submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-12-1-camallanus-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.12.1. Camallanus In Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-12-2-capillaria\/\"><span class=\"wp-block-navigation-item__label\">10.12.2. Capillaria<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-13-pests-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">10.13. Pests in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-14-fish-lice-on-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">10.14. Fish Lice on Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-15-dwarf-gourami-disease\/\"><span class=\"wp-block-navigation-item__label\">10.15. Dwarf Gourami Disease<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/10-16-graphite-disease-in-bettas\/\"><span class=\"wp-block-navigation-item__label\">10.16. Graphite Disease in Bettas<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/11-fish-disease-symptoms\/\"><span class=\"wp-block-navigation-item__label\">11. Fish Disease Symptoms<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"11. Fish Disease Symptoms submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/11-1-hole-in-the-head-syndrome\/\"><span class=\"wp-block-navigation-item__label\">11.1. Hole in the Head Syndrome<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"11.1. Hole in the Head Syndrome submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-1-1-hexamita-and-hith\/\"><span class=\"wp-block-navigation-item__label\">11.1.1. Hexamita and HITH<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-1-2-spots-on-the-head-of-fish\/\"><span class=\"wp-block-navigation-item__label\">11.1.2. Spots on the Head of Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-2-white-poop-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">11.2. White Poop in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-3-malawi-bloat\/\"><span class=\"wp-block-navigation-item__label\">11.3. Malawi Bloat<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-4-dropsy\/\"><span class=\"wp-block-navigation-item__label\">11.4. Dropsy<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-5-hollow-belly\/\"><span class=\"wp-block-navigation-item__label\">11.5. Hollow Belly<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-6-swim-bladder-syndrome-in-tropical-fish\/\"><span class=\"wp-block-navigation-item__label\">11.6. Swim Bladder Syndrome in Tropical Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-7-shimmying-in-tropical-fish\/\"><span class=\"wp-block-navigation-item__label\">11.7 Shimmying in Tropical Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-8-twirling-in-tropical-fish\/\"><span class=\"wp-block-navigation-item__label\">11.8. Twirling in Tropical Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-9-spinal-deformities-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">11.9. Spinal Deformities in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-10-white-skin-blotches-on-a-fish\/\"><span class=\"wp-block-navigation-item__label\">11.10. White Skin Blotches on a fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-11-red-skin-blotches\/\"><span class=\"wp-block-navigation-item__label\">11.11. Red Skin Blotches<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-12-neon-disease\/\"><span class=\"wp-block-navigation-item__label\">11.12. Neon Disease<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-13-slime-coat-syndrome-on-a-fish\/\"><span class=\"wp-block-navigation-item__label\">11.13. Slime Coat Syndrome on a Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-14-scaly-skin-on-a-fish\/\"><span class=\"wp-block-navigation-item__label\">11.14. Scaly Skin on a Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-15-fish-not-eating\/\"><span class=\"wp-block-navigation-item__label\">11.15. Fish not Eating<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-16-aggression-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">11.16. Aggression in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-17-black-death-in-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">11.17. Black Death in Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-18-black-head-syndrome\/\"><span class=\"wp-block-navigation-item__label\">11.18. Black Head Syndrome<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/11-19-gas-bubble-disease\/\"><span class=\"wp-block-navigation-item__label\">11.19. Gas Bubble Disease<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/12-treatment-of-fish-disease-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">12. Treatment of Fish Disease in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"12. Treatment of Fish Disease in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-1-basics-of-treatment-of-fish-diseases\/\"><span class=\"wp-block-navigation-item__label\">12.1. Basics of Treatment of Fish Diseases<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-2-treatments-summary-for-fish-diseases\/\"><span class=\"wp-block-navigation-item__label\">12.2. Treatments Summary for Fish Diseases<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-3-quarantine-tanks\/\"><span class=\"wp-block-navigation-item__label\">12.3. Quarantine Tanks<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/12-4-ineffective-medicines-for-fish-diseases\/\"><span class=\"wp-block-navigation-item__label\">12.4. Ineffective Medicines for Fish Diseases<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"12.4. Ineffective Medicines for Fish Diseases submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-4-1-natural-aquarium-medications\/\"><span class=\"wp-block-navigation-item__label\">12.4.1. \u201cNatural\u201d Aquarium Medications<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-4-2-salt-for-treating-fish-disease\/\"><span class=\"wp-block-navigation-item__label\">12.4.2. Salt for Treating Fish Disease<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-4-3-aquarium-dyes\/\"><span class=\"wp-block-navigation-item__label\">12.4.3. Aquarium Dyes<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-4-5-antiseptics-for-treating-fish-disease\/\"><span class=\"wp-block-navigation-item__label\">12.4.5. Antiseptics for Treating Fish Disease<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-4-6-furan-and-sulfa-drugs-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">12.4.6. Furan and Sulfa Drugs in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-4-7-quinine-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">12.4.7. Quinine in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-5-fish-dont-drink\/\"><span class=\"wp-block-navigation-item__label\">12.5. Fish Don\u2019t Drink<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-6-sterilization-of-aquariums\/\"><span class=\"wp-block-navigation-item__label\">12.6. Sterilization of Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-7-making-medicated-fish-food-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">12.7. Making Medicated Fish Food for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-8-euthanizing-a-fish\/\"><span class=\"wp-block-navigation-item__label\">12.8. Euthanizing a Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-9-avoiding-diseases-in-fish\/\"><span class=\"wp-block-navigation-item__label\">12.9. Avoiding Diseases in Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/12-10-the-shotgun-approach\/\"><span class=\"wp-block-navigation-item__label\">12.10. The Shotgun Approach<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/13-stocking\/\"><span class=\"wp-block-navigation-item__label\">13. Stocking<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"13. Stocking submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/13-1-stocking-opinions\/\"><span class=\"wp-block-navigation-item__label\">13.1. Stocking Opinions<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/13-2-calculating-stocking-ratio\/\"><span class=\"wp-block-navigation-item__label\">13.2. Calculating Stocking Ratio<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/13-3-lifespan-of-an-aquarium-fish\/\"><span class=\"wp-block-navigation-item__label\">13.3. Lifespan of an Aquarium Fish<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/14-equipment-for-the-tropical-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14. Equipment for the Tropical Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"14. Equipment for the Tropical Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/14-1-uv-sterilizers-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.1. UV Sterilizers for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"14.1. UV Sterilizers for the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-1-1-aquarium-uv-in-depth\/\"><span class=\"wp-block-navigation-item__label\">14.1.1. Aquarium UV in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-1-2-selecting-an-aquarium-uv-unit\/\"><span class=\"wp-block-navigation-item__label\">14.1.2 Selecting an Aquarium UV Unit<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/14-2-aquarium-substrates\/\"><span class=\"wp-block-navigation-item__label\">14.2. Aquarium Substrates<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"14.2. Aquarium Substrates submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-2-1-sand-as-an-aquarium-substrate\/\"><span class=\"wp-block-navigation-item__label\">14.2.1. Sand as an Aquarium Substrate<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-2-2-gravel-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.2.2. Gravel in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-2-3-buffering-substrates-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.2.3. Buffering Substrates in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-2-4-anaerobic-myth-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.2.4. Anaerobic Myth in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-3-rocks-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.3. Rocks in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/14-4-lights-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.4. Lights in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"14.4. Lights in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-4-1-aquarium-light-spectrums\/\"><span class=\"wp-block-navigation-item__label\">14.4.1. Aquarium Light Spectrums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-4-2-obsolete-lighting-standards-for-aquariums\/\"><span class=\"wp-block-navigation-item__label\">14.4.2. Obsolete Lighting Standards for Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-5-piping-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.5. Piping in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-6-aquarium-pump-design\/\"><span class=\"wp-block-navigation-item__label\">14.6. Aquarium Pump Design<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-7-overflow-devices-for-aquariums\/\"><span class=\"wp-block-navigation-item__label\">14.7. Overflow Devices for Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-8-aquarium-heaters\/\"><span class=\"wp-block-navigation-item__label\">14.8. Aquarium Heaters<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-9-wavemakers-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.9. Wavemakers in the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-10-wood-in-an-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.10. Wood in an Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-11-fish-electrocution\/\"><span class=\"wp-block-navigation-item__label\">14.11. Fish Electrocution<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-12-silicone-rubber-for-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">14.12. Silicone Rubber for the Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-13-aquarium-electric-cost\/\"><span class=\"wp-block-navigation-item__label\">14.13. Aquarium Electric Cost<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/14-14-cleaning-old-aquariums\/\"><span class=\"wp-block-navigation-item__label\">14.14. Cleaning Old Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/15-planted-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15. Planted Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"15. Planted Aquariums submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-1-planted-aquariums-in-depth\/\"><span class=\"wp-block-navigation-item__label\">15.1. Planted Aquariums in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-2-fish-for-a-planted-aquarium\/\"><span class=\"wp-block-navigation-item__label\">15.2. Fish for a Planted Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-3-fish-limitations-in-a-planted-aquarium\/\"><span class=\"wp-block-navigation-item__label\">15.3. Fish Limitations in a Planted Aquarium<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-4-types-of-planted-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15.4. Types of Planted Aquariums<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/15-5-aquarium-fertilizing\/\"><span class=\"wp-block-navigation-item__label\">15.5. Aquarium Fertilizing<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"15.5. Aquarium Fertilizing submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-5-1-ready-made-fertilizers\/\"><span class=\"wp-block-navigation-item__label\">15.5.1. Ready Made Fertilizers<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-5-2-fertilizer-programs\/\"><span class=\"wp-block-navigation-item__label\">15.5.2. Fertilizer Programs<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-5-3-estimative-index\/\"><span class=\"wp-block-navigation-item__label\">15.5.3. Estimative Index<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-5-4-nh4-tabs-aquarium-fertilizer\/\"><span class=\"wp-block-navigation-item__label\">15.5.4. NH4 + Tabs Aquarium Fertilizer<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-5-5-diy-epiphytic-fertilizer\/\"><span class=\"wp-block-navigation-item__label\">15.5.5. DIY Epiphytic Fertilizer<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-5-6-fish-food-fertilizer\/\"><span class=\"wp-block-navigation-item__label\">15.5.6. Fish Food Fertilizer<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-5-7-diy-fertilizers\/\"><span class=\"wp-block-navigation-item__label\">15.5.7. DIY Fertilizers<\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/15-6-carbon-dioxide-and-plants-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">15.6. Carbon Dioxide and Plants in the Aquarium<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"15.6. Carbon Dioxide and Plants in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-6-1-low-tech-co2\/\"><span class=\"wp-block-navigation-item__label\">15.6.1. Low Tech CO2<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-6-2-kh-ph-co2-relationships-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">15.6.2. KH pH CO2\u00a0Relationships in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-6-3-high-tech-co2-systems\/\"><span class=\"wp-block-navigation-item__label\">15.6.3. High Tech CO2 Systems<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-6-4-co2-from-food-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">15.6.4. CO2 From Food in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-6-5-aquarium-liquid-carbon-products\/\"><span class=\"wp-block-navigation-item__label\">15.6.5. Aquarium Liquid Carbon Products<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-6-6-measuring-co2\/\"><span class=\"wp-block-navigation-item__label\">15.6.6. Measuring CO2<\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-7-substrates-for-the-planted-aquarium\/\"><span class=\"wp-block-navigation-item__label\">15.7. Substrates for the Planted Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-8-walstad-aquarium\/\"><span class=\"wp-block-navigation-item__label\">15.8. Walstad Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-9-high-tech-planted-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15.9. High Tech Planted Aquariums<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-10-hybrid-planted-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15.10. Hybrid Planted Aquariums<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-11-many-fish-many-plants\/\"><span class=\"wp-block-navigation-item__label\">15.11. Many Fish Many Plants<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-12-propagating-plants\/\"><span class=\"wp-block-navigation-item__label\">15.12. Propagating Plants<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-13-hau-planted-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15.13. Hau Planted Aquariums<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-14-low-tech-planted-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15.14. Low Tech Planted Aquariums<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-15-sterilizing-aquarium-plants\/\"><span class=\"wp-block-navigation-item__label\">15.15. Sterilizing Aquarium Plants<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-16-natural-or-balanced-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15.16. \u201cNatural\u201d or \u201cBalanced\u201d Aquariums<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/15-17-father-fish-aquariums\/\"><span class=\"wp-block-navigation-item__label\">15.17. Father Fish Aquariums<\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/16-algae-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16. Algae in the Aquarium<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"16. Algae in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-1-aquarium-algae-biology\/\"><span class=\"wp-block-navigation-item__label\">16.1. Aquarium Algae Biology<\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/16-2-controlling-aquarium-algae\/\"><span class=\"wp-block-navigation-item__label\">16.2. Controlling Aquarium Algae<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"16.2. Controlling Aquarium Algae submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-2-1-algae-in-fish-only-tanks\/\"><span class=\"wp-block-navigation-item__label\">16.2.1. Algae in Fish Only Tanks<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-2-2-algae-in-high-tech-tanks\/\"><span class=\"wp-block-navigation-item__label\">16.2.2. Algae in High Tech Tanks<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-2-3-algae-in-low-tech-tanks\/\"><span class=\"wp-block-navigation-item__label\">16.2.3. Algae in Low Tech Tanks<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-2-4-algae-eaters-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.2.4. Algae Eaters in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-2-5-the-algae-war-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.2.5. The Algae War in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-2-6-chemical-algae-control-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.2.6. Chemical Algae Control in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-2-7-chihiros-doctor\/\"><span class=\"wp-block-navigation-item__label\">16.2.7. Chihiros Doctor<\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-3-thread-algae-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.3. Thread Algae in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-4-blue-green-algae-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.4. Blue-Green Algae in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-5-black-beard-algae\/\"><span class=\"wp-block-navigation-item__label\">16.5. Black Beard Algae<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-6-staghorn-algae\/\"><span class=\"wp-block-navigation-item__label\">16.6. Staghorn Algae<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-7-aquarium-green-water\/\"><span class=\"wp-block-navigation-item__label\">16.7. Aquarium Green Water<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-8-brown-algae-in-freshwater-aquariums\/\"><span class=\"wp-block-navigation-item__label\">16.8. Brown Algae in Freshwater Aquariums<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-9-green-spot-algae\/\"><span class=\"wp-block-navigation-item__label\">16.9. Green Spot Algae<\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/16-10-water-mold-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.10. Water Mold in the Aquarium<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"16.10. Water Mold in the Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-10-1-white-fuzz-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.10.1. White Fuzz in the Aquarium<\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-11-aquarium-slime-molds\/\"><span class=\"wp-block-navigation-item__label\">16.11. Aquarium Slime Molds<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-12-red-spot-algae-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">16.12. Red Spot Algae in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/16-13-a-few-aquarium-oddities\/\"><span class=\"wp-block-navigation-item__label\">16.13. A Few Aquarium Oddities<\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/17-aquarium-fish-selection\/\"><span class=\"wp-block-navigation-item__label\">17. Aquarium Fish Selection<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"17. Aquarium Fish Selection submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-1-native-water-chemistries\/\"><span class=\"wp-block-navigation-item__label\">17.1. Native Water Chemistries<\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/17-2-biotopes\/\"><span class=\"wp-block-navigation-item__label\">17.2. Biotopes<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"17.2. Biotopes submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-2-1-blackwater-biotope\/\"><span class=\"wp-block-navigation-item__label\">17.2.1. Blackwater Biotope<\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-3-blackwater-fish\/\"><span class=\"wp-block-navigation-item__label\">17.3. Blackwater Fish<\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/17-4-lake-malawi-cichlids\/\"><span class=\"wp-block-navigation-item__label\">17.4. Lake Malawi Cichlids<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"17.4. Lake Malawi Cichlids submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-4-1-malawi-aquariums\/\"><span class=\"wp-block-navigation-item__label\">17.4.1. Malawi Aquariums<\/span><\/a><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/17-5-goldfish-aquarium\/\"><span class=\"wp-block-navigation-item__label\">17.5. Goldfish Aquarium<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"17.5. Goldfish Aquarium submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-5-1-types-of-goldfish\/\"><span class=\"wp-block-navigation-item__label\">17.5.1. Types of Goldfish<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-5-2-size-of-goldfish\/\"><span class=\"wp-block-navigation-item__label\">17.5.2. Size of Goldfish<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-5-3-stocking-goldfish\/\"><span class=\"wp-block-navigation-item__label\">17.5.3. Stocking Goldfish<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-5-4-goldfish-care\/\"><span class=\"wp-block-navigation-item__label\">17.5.4. Goldfish Care<\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-6-guppies-and-livebearers\/\"><span class=\"wp-block-navigation-item__label\">17.6. Guppies and Livebearers<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-7-aquarium-bettas\/\"><span class=\"wp-block-navigation-item__label\">17.7. Aquarium Bettas<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-8-oscars-in-the-aquarium\/\"><span class=\"wp-block-navigation-item__label\">17.8 Oscars in the Aquarium<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-9-nano-aquariums\/\"><span class=\"wp-block-navigation-item__label\">17.9. Nano Aquariums<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-10-aquarium-shrimp\/\"><span class=\"wp-block-navigation-item__label\">17.10. Aquarium Shrimp<\/span><\/a><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/17-11-discus\/\"><span class=\"wp-block-navigation-item__label\">17.11. Discus<\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"17.11. Discus submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-11-1-discus-husbandry\/\"><span class=\"wp-block-navigation-item__label\">17.11.1. Discus Husbandry<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-11-2-filtration-for-discus\/\"><span class=\"wp-block-navigation-item__label\">17.11.2. Filtration for Discus<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-11-3-water-for-discus\/\"><span class=\"wp-block-navigation-item__label\">17.11.3. Water for Discus<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-11-4-food-for-discus\/\"><span class=\"wp-block-navigation-item__label\">17.11.4. Food for Discus<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-11-5-discus-pheromones\/\"><span class=\"wp-block-navigation-item__label\">17.11.5. Discus Pheromones<\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/17-11-6-breeding-discus\/\"><span class=\"wp-block-navigation-item__label\">17.11.6. Breeding Discus<\/span><\/a><\/li><\/ul><\/li><\/ul><\/li><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/18-aquarium-maintenance\/\"><span class=\"wp-block-navigation-item__label\">18. Aquarium Maintenance<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"18. Aquarium Maintenance submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li data-wp-context=\"{ &quot;submenuOpenedBy&quot;: { &quot;click&quot;: false, &quot;hover&quot;: false, &quot;focus&quot;: false }, &quot;type&quot;: &quot;submenu&quot;, &quot;modal&quot;: null, &quot;previousFocus&quot;: null }\" data-wp-interactive=\"core\/navigation\" data-wp-on--focusout=\"actions.handleMenuFocusout\" data-wp-on--keydown=\"actions.handleMenuKeydown\" data-wp-on--pointerenter=\"actions.openMenuOnHover\" data-wp-on--pointerleave=\"actions.closeMenuOnHover\" data-wp-watch=\"callbacks.initMenu\" tabindex=\"-1\" class=\"wp-block-navigation-item has-child open-on-hover-click wp-block-navigation-submenu\"><a class=\"wp-block-navigation-item__content\" href=\"https:\/\/aquainfo.nl\/en\/18-1-aquarium-water-changes\/\"><span class=\"wp-block-navigation-item__label\">18.1. Aquarium Water Changes<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><button data-wp-bind--aria-expanded=\"state.isSubmenuOpen\" data-wp-on--click=\"actions.toggleMenuOnClick\" aria-label=\"18.1. Aquarium Water Changes submenu\" class=\"wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle\" ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" fill=\"none\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M1.50002 4L6.00002 8L10.5 4\" stroke-width=\"1.5\"><\/path><\/svg><\/button><ul data-wp-on--focus=\"actions.openMenuOnFocus\" style=\"color:#005d94\" class=\"wp-block-navigation__submenu-container has-text-color has-background has-white-background-color wp-block-navigation-submenu\"><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-1-1-water-changes-in-depth\/\"><span class=\"wp-block-navigation-item__label\">18.1.1. Water Changes in Depth<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-1-3-water-change-water\/\"><span class=\"wp-block-navigation-item__label\">18.1.3. Water Change Water<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-1-2-aquarium-water-change-math\/\"><span class=\"wp-block-navigation-item__label\">18.1.2. Aquarium Water Change Math<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-1-4-softened-ro-di-tds\/\"><span class=\"wp-block-navigation-item__label\">18.1.4. Softened, RO, DI, TDS<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-2-drip-water-changes\/\"><span class=\"wp-block-navigation-item__label\">18.2. Drip Water Changes<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-3-cleaning-the-substrate\/\"><span class=\"wp-block-navigation-item__label\">18.3. Cleaning the Substrate<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-4-cleaning-a-filter\/\"><span class=\"wp-block-navigation-item__label\">18.4. Cleaning a Filter<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-5-heavy-stocked-maintenance\/\"><span class=\"wp-block-navigation-item__label\">18.5. Heavy Stocked Maintenance<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-6-old-tank-syndrome\/\"><span class=\"wp-block-navigation-item__label\">18.6. Old Tank Syndrome<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><li class=\"wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/aquainfo.nl\/en\/18-7-sick-tank-syndrome\/\"><span class=\"wp-block-navigation-item__label\">18.7. Sick Tank Syndrome<\/span><span class=\"wp-block-navigation-item__description\"> <\/span><\/a><\/li><\/ul><\/li><\/ul><\/nav>\n\n\n<p class=\"wp-block-paragraph\"><strong>Source<\/strong>: <a href=\"https:\/\/aquariumscience.org\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Aquariumscience.org<\/a> &#8211; David Bogert<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Goldfish size depends on tank size and feeding. In small tanks, they remain smaller due to growth-inhibiting hormones, but this doesn&#8217;t harm them. Larger tanks allow for larger fish, reaching up to 7 inches in body length for common goldfish. Fancy goldfish remain smaller but fuller. Misinformation online exaggerates goldfish size and potential harm from stunting.<\/p>\n","protected":false},"author":566,"featured_media":114277,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55862,64645],"tags":[],"class_list":["post-114276","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aquariumscience","category-goldfish"],"featured_image_urls_v2":{"full":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish.jpg",862,539,false],"thumbnail":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish-150x94.jpg",150,94,true],"medium":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish-300x188.jpg",300,188,true],"medium_large":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish-768x480.jpg",768,480,true],"large":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish.jpg",862,539,false],"1536x1536":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish.jpg",862,539,false],"2048x2048":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish.jpg",862,539,false],"commercegurus-pdp-large":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish.jpg",862,539,false],"commercegurus-plp-mobile":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish-441x276.jpg",441,276,true],"woocommerce_thumbnail":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish-300x188.jpg",300,188,true],"woocommerce_single":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish-600x375.jpg",600,375,true],"woocommerce_gallery_thumbnail":["https:\/\/aquainfo.nl\/wp-content\/uploads\/2025\/03\/Size-of-Goldfish-150x94.jpg",150,94,true]},"post_excerpt_stackable_v2":"<p>Goldfish size depends on tank size and feeding. In small tanks, they remain smaller due to growth-inhibiting hormones, but this doesn&#8217;t harm them. Larger tanks allow for larger fish, reaching up to 7 inches in body length for common goldfish. Fancy goldfish remain smaller but fuller. Misinformation online exaggerates goldfish size and potential harm from stunting.<\/p>\n","category_list_v2":"<a href=\"https:\/\/aquainfo.nl\/en\/category\/aquariumscience\/\" rel=\"category tag\">AquariumScience<\/a>, <a href=\"https:\/\/aquainfo.nl\/en\/category\/goldfish\/\" rel=\"category tag\">Goldfish<\/a>","author_info_v2":{"name":"David Bogert","url":"https:\/\/aquainfo.nl\/en\/author\/david-bogert\/"},"comments_num_v2":"0 comments","_links":{"self":[{"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/posts\/114276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/users\/566"}],"replies":[{"embeddable":true,"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/comments?post=114276"}],"version-history":[{"count":0,"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/posts\/114276\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/media\/114277"}],"wp:attachment":[{"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/media?parent=114276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/categories?post=114276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aquainfo.nl\/en\/wp-json\/wp\/v2\/tags?post=114276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}