I have included a couple of pics. I need help identifying this thing in my pics. Don't know if it's good or bad. And if it is bad how do i get rid of it. The first one is a picture taken from the main tank, it's a black furry thing, which is only isolated in the area where the picture was taken. I haven't seen it spread anywhere else. [img]https://www.livingreefs.com/gallery/files/7/2/0/blackfurryalgae.JPG[/img] The second picture was taken from my refuge/sump it's all over the place. It's basically dominating my chateo. [img]https://www.livingreefs.com/gallery/files/7/2/0/refugepics2003.jpg[/img] Any help will be appreciated DJPJ