I purchased a Purple Tang on Thanksgiving weekend and have had issues since. When I got it home, I noticed its eye was starting to cloud and it had a hard time seeing food. I quickly treated my QT with Prazipro and its eye cleared up in a couple of days......so everything was normal until now. A few days ago, I noticed some ich spots popping up, so I decided to use Cupramine and treat. I used the recommended dosage of 16 drops the first day, to slowly increase the copper and not shock the fish. The next day, I noticed that the fish had a horrible white looking rash over its enitre body. I've never seen anything like it and now I am afraid that it is going to die unless I do something. Can anyone help ID what this is?