I hate to admit it, but I gave in to Cyano and used meds. My tank has LPS, softies, and lots of inverts. I used Chemiclean, and it worked great.

It's been 2 months since the treatment, and no cyano has come back. My corals didn't mind the stuff at all - as a matter of fact, they "perked up", if anything.

Cyano is one of the ugliest plagues IMO, but from what I have seen, it's usually one of the last - hang in there - you will persevere