I have acquired a new algae! whats less exciting then that is the fact that it is carpeting the sand, killing my weaker corals, and uglying up the tank all together! i don't have any pictures of it because i think it would be pretty easy to I.D. but please correct me if I'm wrong. its red and covers the sand, and the rocks! ughhhh

I've tried one type of product recommended by my
LFS but it merely dented the problem. a few days later it had come back in the fullest! i really don't expect a surefire answer but any additional information you can give me would be greatly appreciated!
thank you so much,
Patrick E.