Well, today with given permission I bought 3 firemouths, and 3 convicts. They were pretty small, and I decided to put 2 firemouths and 2 convicts in there. One firemouth almost got eaten by my larger Jack Dempsey, so I decided to reach in and pull the firemouth out who is residing in a 5 gallon with 2 other small firemouths and 2 convicts. Now currently, the one convict is left in the 55 gallon. I was lucky to pull the other firemouth and other convict. But apparently this convict is hiding and avoiding being noticed. Are convicts naturally good at escaping bigger fish? I honestly thought that my fish wouldn't try to eat the others, seeing as I've never fed them live food. I learned my lesson, don't put fish under 2-3" in my tank.