Well it had to happen, every fish i have bought has been in a qt tank for a while then added to the display, and it had to be that a damn hippo tang started to get ick and i'm having some issues. I got most of the fish out out but the rest are at risk, what should i use in the qt tank, copper. please let me know, my other problem is that my qt tank is only a 30 gallon and i have alot of fish