I don't think that's cyano. It's far too bushy to be cyano.
When looking at this algae in real life, is it more pink than purple? If so, I have seen this at a lfs. Don't know what it is and don't know how to get rid of it. Sorry
Hmm. On second thought, maybe a seahare might take care of it, but of that I am not sure.
If it is cyano, check out this thread....
http://www.canreef.com/vbulletin/showthread.php?t=23181