okay thank you for the advice. Only 1 fish has ich right now. And it is one of the clownfish. I know my tank is slightly over stocked but is extremely peaceful and everyone seems happy. No fighting or pushing for room or anything. They just kind of swim lazily around. I think the big stressing factor was that when I bought the clownfish, I knew it didn't look right. The guy at the fish store even offered to do some overnight medicine dip or something to make sure. Or even order a new pair of clowns for me. But I had been looking for a month and at the time the only bad thing was one had a little jagged fin. (The guy said it came that way and had been growing back, and I trust him).