This is a discussion on Poor Goldfish within the Cyprinids and Atherinids forums, part of the Freshwater and Tropical Fish category; -->
My parents and I think that comet Goldfish have been kept in China for a thousand years and have traditionally been kept in bowls ...
Hi if you have 3 Goldfish i would deffinatly recommed a 20 gallon. I easily took care of 3 fan tails in a 20 gallon with a good filter and every other week 20% 30ish% water changes, i kept them for about 2 years. I added another fish, had a disease, and they all slowly died, so foolish!! i felt really bad, and one of my fantails was 5 years old, and he was the first to go. But they all grew and did great in a 20 gallon.
I go by the 10 gallon to 1 Goldfish rule, I dont think it applies to comets though. My friend who got me started has kept Goldfish for years and she has successfully done that. Although recently she got some type of fluke, disease? I dont know. And she lost half her Goldfish that she had for years and years =( But it makes me mad that people think Goldfish are beginners pets, I wouldnt even keep one because they are hard to keep cold (southern CA, 100 here today) and they are too messy and grow big.