I just got a purple tang a few weeks ago and he got ick really bad after I introduced him into my main tank. I put him in a QT with a blue tang who to was sick. Well the purple tang was eating well and looked as if he was almost ick free so I moved him a the blue tang into a nano cube because I wanted to get them out of the copper. Well this morning surprisingly the blue tang died. Now the purple tang stopped eating and half of him is white! But its NOT ick at least I dont think it looks completly different. Any ideas on how I could get him to eat???