Is my tang turning into a zombie?

[fishoholic]

Sounds like marine velvet to me, copper in a QT tank was the only way I saved some of my fish when they had it, also my sohal looked like your tang when he was in QT so there's a chance it could be that.

Here's a link about velvet
http://www.reefkeeping.com/issues/2004-07/sp/feature/