Thanks everybody for your help, I'll keep a close eye on it, and if it takes over i guess i will have to scrape it off. It doesent seem like any of my fish or inverts are going to eat it.
I posted this in the new hobbyist forum but I would like to see what you guys think.
This stuff has been growing for a couple of months, and I dont know what it is.
Has anybody seen this stuff before? it has been growing on a couple of pieces of my live rock for about 2 months. I dont know if I should remove it or what?