Took my orange colony to LFS he said it was hair algae. He put 10 little crabs in the container and they ate all day. I am going to leave them in there over night and see what happens in the morning.. If this works I guess I will be having crabs over for dinner for a while. The two other areas that were affected... 1. is just gone, the entire colony vanished. 2. got covered with a whiteish, blueish
slime and I took them out of the tank. I'll keep you advised. Bubba