Tennent Tang Diet?

Hi all, I have added a tennent tang to the aquarium, and he/she spits out
everything he/she eats. The fish is happy and active and mouths almost
everything, but spits it all back out. I have tried Seaweed Selects Green
Marine Algae, Formual Two flakes, and even some seaweed I got at the Korean
Market down the road (I figured if its good enough for me...) Can anyone
offer any suggestions? I got this fish assuming I'd be able to find lots of
info on it, like you can with a LOT of other tangs, but info has been
scarce, to say the least.

Thanks, mikekelly (at) carolina (dot) rr (dot) com