The Flame Angel is a dwarf angelfish.
Picking algae from rocks is where they get most of their food in the wild.
Add some small starts of macroalgae, try some Nori, try Emerald Entree frozen food(it's the best frozen food for all fish, including herbivores, because it has lots of algae).
You could also leave the lights on all night and overfeed to allow the tank to grow more soft algae on the rock and glass, that's what dwarf angelfish really like the most.
If in the end you feel that you must remove the fish, it's actually quite easy to catch fish from a reef aquarium. I just caught my large Rabbitfish to move it from a full reef tank that the fish cleared of macroalgae to a tank that has a good growth of macroalgae. This Rabbitfish is a pig for algae. I love it. Algae is a must for a healthy reef aquarium.

It took about 15 seconds to catch.
We have the answers to all your reefkeeping questions.

Edited by Mark Peterson - March 13 2009 at 3:00pm