Help with cyano!!!!!

[crister13]

I do pwcs every week (20%-30%) with a RODI unit. I have 2 1400 gph koralia powerheads and I have cyano on my rocks and sand. No THAT much but it covers quite a bit................ How should I get rid of it?
Thanks!

 

[ccCapt]

Cyano is feed by excessive nutrients in the tank. Have you ever tested your phosphate? Do you run carbon?

 

[crister13]

Yes I run carbon and I need to get a a test kit for phosphates. I just have nitrate nitrite and ammo and PH. I guess I should get more nassarius snails! Any idea on how to get rid of it? And what should I get to get the itrients down?