Please help me identify what I believe is a nuisance algae of some type, and how to get rid of it. It primarily hangs out on the sand bed, but does creep up some of the rock structure and Coral. At night it goes away completely on the sand, and the bed turns white. As soon as the lights comes on, and through throughout the day, it gets darker and more intense and comes to life. Primarily a rusty, brown orange coloration. I am at a loss. Thank you for any help.