I’ve used chemiclean in the past, but cyano always came back after a couple weeks.I have used Chemiclean for years and it does the trick for cyano as well as generally helps with organic crud. No cloudy water but yes massive overflows at initial skimming( I believe you need to skim out excess Chemiclean after the 10-20% water change.
Also add macro algae to your fudge.
As for the fuge: I’m not going to run one again in this life, because my issues in the past 3 years were mainly because of it.