I picked up a small Naso tang last night as my first member in my 180 gallon. It's about 2"-3" big. I see it swimming around and does everything a normal fish does... except eat. I have seen him peck at the rocks a little but with this being a new tank, there isn't a whole lot of algae on the rocks yet although they are a little brown. I have a clip with green seaweed on it and if it does go near it, he isn't interested in it at all, hasn't even pecked at it that I have seen. I got some IO herbivore pellets that have seaweed in it and it'll just let the stuff sink by him. It's only been in there for a little over 24 hours, should I give it more time? I have seen some say they may not eat for several days in a new environment, I'm just a little nervous about it dying.