Hi everyone I am hoping someone can help me. I have the deep maroon stuff growing all over my rocks and it hard tooth brush won't scrub it off.
I have seeded the tank with coralline algae from my old tanks. and I seeded heavily but i don't remember anything like this. As I went down from a 150 to a 57 That said I do have the pink coralline algae. This stuff I am unsure I covered the tank for three day and left lighting off. Today when I uncovered it it looks the same now I have very little green algae a couple of tuffs of hair algae. But hardly noticeable. You can barely can scrape with your fingernail but slippery as well. so any help would be appreciated
So here is a picture
Any help would be great it might be a type of Coralline i have not seen before. but the slickness of it makes me believe it might be something other than that.