Hello! I hope it's okay to ask this here. My Mom has five fish in a tank. One of the fish has been really sick (hanging around barely move at the top of the tank) and we've moved her to another tank to treat her because she has ich. We looked over the other fish just now and another one has ich. But this one is behaving normally.
Should we treat the whole tank or take this fish out too and treat him by himself?
Should we treat the whole tank or take this fish out too and treat him by himself?
