Next time give us more information. Such as your pH, Nitrates and ammonia. We need to know. I say go HYPO. Medications are all pretty much useless , but copper works. UV STERILIZERS work and kill free-swimming parasites. But it can kill germs that doesnt need to be killed. Most "Pros" Don't use it and just go hypo when they hit ick. First when you have a fish you get a qt and put the fish in there for about 3 week and when its good and healthy,eating, and swimming etc. you can put it in your main tank.