Hi Mason,
I keep Powder Brown Tang (Acanthurus japonicus) to control the grape marco-algae problem. When I first setup the tank, I also used lots of macro to help control the nutrient. (Titus can verfiy that!) The powder brown take care of that afterward.
Don't confuse this white-cheek powder brown with Acanthurus nigricans. The one I am talking about is a good reef fish (stay small, easy to keep), the other one is not.
Look here for details.
http://www.wetwebmedia.com/GoldRimSs.htm
Bongy