Powder Blue with cloudy eye

[ickmagnet]

I've had my powder blue in my tank for about a month now. He continues to do well and eats non-stop. Having said that, it's been a few days now and I noticed that he has some scratch marks on his body. There also appears to be a slight white film developing over one of his eyes. I don't see any ich on him whatsoever. What is this? Will this pass or is it time to take him out and medicate with copper? That will be super hard catching him but I'd rather do that than have it get worse.