gold fish in 20 gallon
- Thread starter roger1
- Start date
Dangerdoll
Global Moderator
Nope, it's not ok to have 'Plenty" of goldfish in a 20 gallon tank. If keeping comets, you can't even fit 1 in there but if keeping the more round-bodied goldfish such as fantails and other fancy's, you can fit 1 in there but with nothing else at all. The reason being the growth rate and the bio-waste and hormones they produce into the water.
Hiya Roger, Welcome to the forums..
As this is the marine forum, i would not be able to tell you.. Your best off re-posting into the coldwater general section at the main forum menu..As sure there will be lots of experts who can answers any questions you may have..
HTH
Niko
As this is the marine forum, i would not be able to tell you.. Your best off re-posting into the coldwater general section at the main forum menu..As sure there will be lots of experts who can answers any questions you may have..
HTH
Niko
Dolls right. Goldfish really shouldn't be kept in 20-30gallon tanks. They can get very big and do much better in larger tanks and even better in ponds. Since they are related to carp many(such as comets) can reach about two feet in length and can live well over 10 years.
I could see putting two fancies in a 30 gal. tank if the filtration is excellent. (ie. - way over filtered)
It's unclear if the OP has a 20 or a 30g. 15 gal. per fish is not bad but 20 would be better.
It's unclear if the OP has a 20 or a 30g. 15 gal. per fish is not bad but 20 would be better.
Put a big canister on it, like one made for a 400lt tank, and you can keep 3 or 4 small goldfish in 100lt for a while once the tank can handle the bioload.
Meanwhile start digging the pond to transfer them into later on coz you'll only keep 1 or 2 in a 100lt tank when they get bigger. And really a 200lt tank would be more a minimum goldfish size tank.
Makers of goldfish bowls and small tanks perpetuate the myth that goldfish can live in a small space. I saw a plastic tank in a shopping center recently, one of those cheapies with an included (tiny) submerged filter. The tank was 23 lt. They had a picture on the box with *5* goldfish in the tank. Ouch. I have 5 in 220lt and know that's only a relatively temporary situation.
tim
Meanwhile start digging the pond to transfer them into later on coz you'll only keep 1 or 2 in a 100lt tank when they get bigger. And really a 200lt tank would be more a minimum goldfish size tank.
Makers of goldfish bowls and small tanks perpetuate the myth that goldfish can live in a small space. I saw a plastic tank in a shopping center recently, one of those cheapies with an included (tiny) submerged filter. The tank was 23 lt. They had a picture on the box with *5* goldfish in the tank. Ouch. I have 5 in 220lt and know that's only a relatively temporary situation.
tim
roger1 said:
Trust me, this has been done before. By many people even as you are reading this. Then again, most people don't care about the animals and keep adding goldfish for aesthetic reasons.
In 20-30g I'd keep one or two, and even by saying that I'm being a bit liberal. As you may have heard thousands of times before, goldfish really do get big if given adequate space and they are extrmely demanding on your filter system. The "bad condition" you've coined to keeping multiple goldfish in such a tank is not only detrimental but lethal to the fish.
I saw one of these at my local supermarket that also had a picture with 5 goldfish in the tank but it was only 5lt!amosf said:
Iv got 3 fantail goldfish in a 330lt pond with 6ltrs of filter media. I feel that goldfish need about 100ltrs of well filtered water each if they are to reach maximum size, maybe more for more wild strains.
mostlycichlids
Cichlid Specialist
I keep 2 fancys in a 20 gallon but I have a 2penguin biowheel 200s which are rated for 50 gallons each. It is also a planted tank and I do weekly 50% water changes. I also plan to upgrade to a 40 gallon later this year as they are getting bigger now and seem to want more space.
