Ok, so the last 3 fish I have bought and brought back have gotten ich. I got 2 pbass from an lfs and they died before I could treat the ich. Now, the green terror I got from a different store has bad ich. It is in a 55 gallon tank with others, and I could put it in the tank with my red eared slider and turn the heat up and add ichex, or I could even take the red eared slider out and do it. What is the best way?