So, all but one of my fish caught ick and have died rapidly. We could not treat it fast it enough, though, because we have fry in the tank. The fry are starting to die now, though, but I know that you can't use ick treatment on the babies. Someone help me. I have a new, smaller tank that someone is giving me today, should I start a whole new tank and put the fry in? Should I just do a water change? Tell me what to do.