I have 1 Eastern Painted in a 60 gal pond outside, and I bring her in for the winter in a 55 gal. tank. I am in the processing of buliding a 60 gal pond in my rec. room. (finished basement). 60 gal is only good for 1 painted though. She seems to do fine.When she comes inside she sulks for about 3 days. She loves it outside.