i have just started to notice the hair algea begining to grow in my nano cube, nothing has changed as far as the water or salt that i use, is there some fish, crab that can combat this. I am assuming it is hair algea little green hairs all over rocks and that mat of GSP that still hasnt opened. The light is only 1 month old, and i have replaced the sponge in the pack with poly fill but change it out every oter day.