i just bought a powder blue tang yesterday, he's about 3". He looks good, no bones sticking out, pretty fat. The only problem is he hasn't moved.. he just swims right infront of my koralia powerhead..?

is this normal? There are no vertical stress marks or anything... Another thing, i've tried flakes, pellets, cyclopeeze, mysis shrimp, brine shrimp, rods, nori.. NOTHING! Doesn't even pick on the rocks. This is day 2, when should i start to worry?
BTW.. Nobody bothers him. No signs of diseases.