Here is what I had to do to get rid of my red slime. First thing was do the 3 day no lights. After that do a good amount of water change. Then cut back on feeding. I would suggest raising your Calc and Alk, check first your Magesium level though. From personal experience I had a low level of Mag, and did not matter how much I added Calc and Kalk. The level would not go up until I got my Mag up past 1300. I finally got it to kick using the Vodka method. That's just what I did, I don't know if it is correct or not. But that's how I got my Cyano to go away for good.