Smokesreef,
If you read the Post "Please Id this Algae" shown just below your post Gary nails it on the head with Dino's. This is a very broad topic, factors as Gary mention - time, balance of system, try Waste Away, a natural way may be to add a refugium and let Chaeto bring balance back, longer dark cycle, reduced lighting, UV sterilizer, syphon out daily what you can - minimize water changes I have heard, the one thing that no one mentions is throwing the kitchen sink at it as well - Lol !!! Not really meaning to be funny but there are a lot of variables and most talk of modest success.
Good Luck