That's not cyano. It's coralline algae. I've been having a war with it, trying to keep it off the front glass. But back to lighting, I use 3 12,000K and 3 actinic bulbs. I was thinking maybe 4 actinic, 1 10,000K and 1 12,000K (or 5 actinic and 1 12,000K)