One of the dreaded algaes we see in our tanks is called "Red Slime Algae" but it is actually Cyano bacteria. Typical solutions: reduce Nitrates & Phosphates; increase flow; siphon out all you can see with airline tubing. Use a turkey baster to blast this off of sensitive corals, because it will smother them to death. I've successfully tried all the methods listed in this article about Cyano and how to remove it: http://www.reefaddicts.com....Cyanobacteria-what-is-it-and-how-can-I-get-rid-of-it

You can now purchase RedCyano Rx from Melev's Reef