We have a 55 gallon tank with two goldfish, Moby and BG. They are both...at least..12 to 15 years old, I have to try to remember when we got them, but a long time ago! They are both pretty good size, especially Moby. BG stands for Blind Goldfish, which she is. But nevertheless, she gets around just fine. In the same tank, we also have Mr Nibbles, a DoJo Loach a friend gave us. He thinks he's a goldfish. He's also around 12 years old. Lastly we have Rock II, a sucker mouth catfish. He doesn't do the best job of keeping algae off the glass, but not bad. He's the newest member, two or three years old. I'd like to get another DoJo loach for Mr Nibbles, but we have not been able to find any for years, and we'd probably need a bigger tank if we did that, anyhow. What kind of fish do you have? I'll post pics another time.