Clove polyps invading!

[JohnnyReeftank]

Hey guys....I noticed these maroon clove polyps spreading about 3-4 months ago and at first I didn't mind. They are pretty small and at first glance it just looks like coraline covering my rocks and they don't seem to sting anything, but they are definately starting to be an issue with my Zoas. I've tried scrubbing them off and they are back 2 days later....I just started running carbon and GFO again so I'll see how that works but besides that, are there any other suggestions out there on how to get rid of these suckers??? Sorry for the iphone pics



When retracted


Invading my Zoa's