Here's an article describing what you might be seeing, and methods used to get rid of it.
http://www.reefaddicts.com/content.php/42-Cyanobacteria-what-is-it-and-how-can-I-get-rid-of-it
I really don't think its cyno. I battled with that in early stages of my tank. Its more of a puffy. Than a felt like cyno. It is only in my macro algae. It will not grow on sand or glass or rocks. I wish I could upload pics off my phone but I can't figure out how.
If you use Tapatalk, you can share mobile pictures. Otherwise, email them to yourself and upload them from a computer. It could be cotton candy algae perhaps. Light pink in color. http://melevsreef.com/id/pink_cotton_algae.html
