I dealt with red cyano a while ago, didn’t add any chemiclean or anything. Went out of town one weekend and came back and it was all gone and now I see this. It’s like a carpet, tried to siphon it out yesterday during a water change and it was very hard to break apart and just clumped together. I know green cyano isn’t as common but I know it’s possible to be green. I also have bubble algae which I’m working to get rid of. Pics are attached below