Thanks for the post

I've got a skimmer, and I've got a fighting conch, dont know if thats as good as one of the queens, btw, arn't they supposed to get huge? haha. Anyway I want to get rid of all the particles in my water with the canister filter, and the uv, I want to give my coraline a head start before this other wierd algae can take hold, none of my cleanup crew will eat it and I've got a pretty wide variety in there. Here's a pic of the stuff i'm talking about, I cant scrub it off with a brush or thats what I'd do.

Its the dark green spots and patches on all thoes rocks, man that stuff drives me crazy, I'm color blind so i thought it was red coraline at first but its kinda fuzzy and it might as well be stuck to thoes rocks with superglue. Strange cause it grew like coraline and right along with the pink and red coraline, but they wont grow in the same spot. Is there any possiblity this is some dark green calcerous (spelling lol) algae