Naso tang, rabbitfish or sea hare?

[michika]

Keep them at the reverse schedule If you run it 24/7 you'll slow down the rate of growth on some of your macro. Every plant that produces chlorophyl (photoautotrophs) requires a dark cycle. You can always bump it up a big more, but just make sure you leave some down time in the dark.

[karazy]

I'd do what Myka said, take out the algae manually, and maybe take out one of your larger fish.
you could also try a blackout for a day or two.

I think that the naso tang wouldn't be a very good choice at all considering that it might not even eat the algae (every fish is different)
and also because if you cant get rid of it you've got a pretty big fish on your hands (ive seen some 16 inchers while snorkeling)