: ... FWIW I typicaly post my own comments and results on things, I dont tell you what is right or what isnt. I have had goldfish (3 Shubunkins, 4 comets(?)-hand pciked from the 19c feeder tank), for about 3 years. For the past 2 they have been in a ~35 gallon clear tote from wa11mart.For the last 2 years the only filter I have used is a powerhead with a spong on the intake. They are around 4" not counting the tail. I change out about 1/4-1/2 of the water a month. They do fine. I have slipped up and let em go for about 3 months before and they didnt seem to care other than the water looking a little dirty. They constantly pick at the bottom (they are related to carp) and keep almost the cleanest bottom in all my tanks. I also have a couple bunches of Anacharis in there to help out. Its low lighting and no heater. I figure I have less than ~50 in the entire setup including fish. I have never killed a goldfish (indoors), and they seem to do great. Eventually I'll probably get a bigger tote or tank for em. Are they stunted? Probably, most are. Would they do better in a bigger tank? I dont know of any fish that wouldnt like a bigger tank. Then again I would like a bigger house and more property, but I currently reside in a small city lot. I complain alot more about that then my fish seem to : 
