I realize I'm bumping an old thread, but thought piggybacking onto an older thread would be better than starting a new one.
I have a 3.5" Naso tang that I picked up about a week ago. It was in my LFS' QT tank for about 3 weeks while I was setting up my new tank. It was eating well in his tank, but doesn't eat (or at least not that I"ve seen) within my tank. It swims along the back wall, and just now started venturing out to the display. I've tried Rod's food, LRS Reef Frenzy, NLS Pellets, New Era Algae grazer discs, Julian Sprungs Nori, and Chefzilla (local food from a board member). It looks a bit skinny, not drastic, but enough to worry me. No harassment or injury I've seen on it.
What else should I try?