When I used chemiclean my skimmer had a hissy fit, and I had to leave the cup off for almost a week. Did 2 50% water changes, I won't use it again. I find Brightwells MB7 helps to control small patches of cyano. It was suggested to me by Walter " Reef Pilot" who has been using it for a while now, so I tried it and it does help.
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Hey! I never "LEFT" the hobby, just doing fresh water now. Which is still listed as part of Canreef if I'm not mistaken. 
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