Im not sure if this is ok or not, if not please delete my post. But I have an algea that ive never seen and thought if someone could help me, this question could also help others in the future. So..... its a hard brown algea growing in the form of a cap. It almost looks like coraline but its brown. Its growing over my zoas and my encrusting montipora. I freaked out whem I saw it smothering my coral amd I scrapped it off immediately. I wish I had gotten a photo first! When it regrows ill get a photo though. It was NOT east to scrub off. It really reminds me if coraline. But coraline usually wont overgrow coral so I dont think thats it. I have bewn battling cyanobacteria lately. Ive almost completely beat the cyano! I still have traces of it. But this is different than cyano, as its hard to scrub off. Any help is appreciated and if I need to post this somewhere else please let me know! Thanks reef2reef!