Cannot get rid of cyano!

[Coralgurl]

Originally Posted by Nate

I maintain about 50 tanks in Calgary and tend to only get cyano in tanks with too low flow, tanks that have had persistent low kh, and tanks that dont get enough water changes.

That's interesting on the low kh, mine is low in both my tanks and I have to dose, it sits around 6. I see issues with corals as a result, but was not aware it contributed to cyano. My small tank hasn't had any issues since the initial setup and its now 13 months old...that said, theres only 1 eel, cuc and some soft corals. I did get rid of the cyano before I started dosing in the larger tank. Are you saying its a combination of the above?