I agree with Pierre-Michel on the quarantine method. That is what I do, and what I am doing right now with my Copperband.

Bristleworm, don't think that MS is quarantining fish for you. They hold fish at the most for two days. Parasites have a three week life cycle. If you want them properly quarantined, they must be separated from your tank for the full three weeks. If you add new fish to your quarantine tank, start the time over from scratch for any fish that were in the QT when you add the new ones.

It may seem like a long time, but it is worth it.