![]() Note this sizing chart is a complete reversal of what you will find the “experts” recommend. In my OPINION, these are the stocking requirements for genetically dwarfed goldfish: Fancy Goldfish Stocking These fish are very wide bodied and need to be stocked as six inch fish even though they rarely exceed a body length of five inches. ![]() Hang-on-back filters or air operated sponge filters are not recommended for fancy goldfish as they don’t supply the necessary bacterial water cleansing that fancy goldfish need. Here is a FOUR gallon aquarium with ELEVEN goldfish that were thriving (again, in my OPINION!): eleven goldfish in a 4 gallon aquarium Stocking Fancy Goldfishįancy “wide bodied” goldfish need better water quality and a larger filtration system compared to a common “narrow bodied” goldfish. They would need to transition to the stocking above as they reach adulthood. Small babies which are only two inches long can obviously be kept in much more crowded conditions. Note that these numbers in the table above are for adults. They have most certainly been “thriving”, at least in my OPINION. They have been made small by hormones produced in response to the small aquarium but they show no evidence of compressed organs. This is a photo of two goldfish which have been in a small UNFILTERED aquarium for 21 and 23 years: Just try to get some filtration and some aeration in the small tanks. The charts above are just OPINIONS and can be violated with abandon, especially with narrow bodied goldfish. nano goldfish aquariumĪlso note that I’ve seen some very good “nano aquariums” as low as one gallons with goldfish swimming and thriving in them. It has been dwarfed by natural hormones, a process which is completely harmless. The fishkeeper obviously kept very good care of the goldfish and the fish is healthy and not “deformed” in any way. Black Moor Goldfishīelow is a photo of a goldfish that had been kept in a one gallon tank for three years. These people’s aquariums and goldfish will probably do just fine. It is very frustrating to see on social media where newcomers to the hobby who start out with common goldfish in small aquariums are shamed and degraded as being inhumane and guilty of animal cruelty. Now these numbers will send the many hobbyists absolutely bonkers. In my OPINION this stocking is: Common goldfish stocking So the stocking for the “narrow bodied” goldfish is the same as for a five inch fish. They can also withstand poor aeration and poor water conditions much better than any other fish. They “grow to the size of the container”. ![]() Fancy Goldfishīecause of the inadvertent selective breeding of the Chinese the “narrow bodied” goldfish can live in much more crowded conditions that a normal fish. These fish are obviously not the victims of “animal cruelty”, at least not in my OPINION. ![]() There are at least a dozen very large (five to six inch body length?) fully grown goldfish thriving in what appears to be about a 75 gallon tank. To illustrate the stocking of common goldfish just look at this tank: Heavily Stocked Goldfish Aquarium It is my OPINION that goldfish do not need large aquariums in order to “thrive”. It is the OPINION of many hobbyists that goldfish need very large aquariums in order to “thrive”. But it all can be summarized in one bullet: the number of gallons needed for each goldfish) is controversial, to put it mildly.
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