Just got a new blonde naso tang, he is about 3 inches and not overly skinny. He was imported by my local reef club 4 weeks ago and has been quarantined by them and treated with hypo salinity and medications. We put him in the tank on Saturday into an acclimation box and released him into the tank Sunday. At first the only thing to bother him was a tomni tang but for a very short time. Everyone is leaving him alone and there seems to be 0 aggression toward him however he is super shy and he hides all the time, will come slightly out of the rock and “hang out” but that’s it. I have not gotten him to eat anything at all. He was eating frozen mysis and nori at the reef club. When do I need to be concerned?