I am a newbe. I have a 55 gal tank. I purchased 8 jack dempsies. Not knowing much about them. After reading up on them I know my tank is going to be over crowded when they mature. The tank has 3 filters. Undergravel, canister and an overflow. If I keep them well fed and change the water often enough, is there a chance they will live and be content? I would hate to get rid of any of them, because of each of there different personalities and the way they change colors with there moods. They all eat out of my hand. I really can't at this time afford a nother tank. Any information or suggestions would be appreciated!!