Interesting, I'm having a similiar if not the same problem. Started out with hairy algea, now I have some cyano starting. I guess I'll cut back on my feeding. Will feeding dried seaweed cause an algea outbreak? Like if the seaweed tears off and floats around. I have an aggressive Queen who likes to tear seaweed up. Little particals end up floating around for a while, however, I do remove the bigger pieces that I can get to.