New sailfin tang

I recently got a sailfin tang(Zebrasoma desjardinii). I've had him in the tank for about 2 days now and I think he is getting adjusted, but not sure. I have been keeping the lights on less time to help reduce stress, but I did notice a little ick on him that seems to be going away. I offered both mysis shrimp and a seaweed leaf, but I haven't noticed him eating yet. I did ask and see him eat at my LFS. How long/often should I try to feed him before I should start to be concerned?

 

bizzzzump

 

do you see the fish picking at the rocks at all? Tangs are grazers. you might could try to soak the seaweed sheet in some garlic to encourage him to eat.