I currently have cyano in two parts of my aquarium. It is currently not to far along it has only been around a few days. I run carbon and phosphate remover. I run a reef devil that I can't seem to get dialed in.There are currently no fish in the tank only snails. I have two K3's and a Quite one 3000 which runs at about 600 gph. I also have a good number of pineapple sponges in my overflow. I have 8 39 watt t5 lights over the aquarium. My numbers are fine but that is because the cyano is taking up all the nitrates. I do use ro water and there is a tds of 2-3. I am guessing my problem is the skimmer but are there any other ideas?