My cyano appeared to be gone, but today it is definitely back. After the first outbreak, I increased circulation and started dosing Kent Marine Buffer parts A and B. Now it's back and there's a layer of "turf" under the red slime. Is this "turf" the real cyano? I took it all out, turf and all. I hope that wasn't a mistake. I ended up removing some sand too because I was having difficulty removing just the cyano. I didn't take a lot of sand though, so I hope that won't be a problem. Anyway, how should I go about fixing this problem?