So Oscar had ich a few months back and now he has it again in the 5 gal. I know you can treat it with heat but I'm worried about the oto catfish I have in there. I know I should probably take him out but I'm just wondering how I treat him. Any ideas? I don't think he can take high heats that I know bettas can. Also how long does the heat treatment go? 5 days? Give or take when the ich "disappears" from the fish? Right now the tank sits at 81F and I know if I put the heater in it will reach the temperature I want. Thanks.