IMO, the Red Sea stuff has eliminated/prevented Cyano in my problem tanks. High waterflow also really helps reduce cyano. Hard not to get sand flying though. I keep my power heads low in the tank and point them up as to not stir up too much sand. I only dose the red sea stuff if I see nitrates above 10, problem algae, or cyano. I use red slime remover as a last resort with a blackout, which usually solves the problem in 48 hours
