I read certain stuff that lima's can be kept in a 55G. I have a 55G and will be upgrading in about a month to a 75G or 100G. I read they get around 12 inches and on planet catfish some mentioned that they are a peacefull fish with a bad reputation. I seen some at my LFS andwanted to get one and maybe put him in the 55G for a short while . Yeah its gonna be overstocked but not for long I hope. Right now there is one African Knife thats around 6-7 inches, one senegal at around 6 inches , three 4-5 inch rainbow fish and one 4 1/2 inch suncat fish. Will the lima eat the knife? I know it might and most likely eat the rainbow fish and I think the sun is gonna be good. Is this a good choice, a choice that "might" work out or just another crazy thread started by some optimistic fish owner. If not any other choices for a predatory not so aggressive type of catfish or oddball?