Not sure if it helps, but here is my cyano experience from last year The Chemiclean worked amazingly - the stuff I did otherwise not so much.
I had a huge cyano problem last year and almost lost everything, not from the cyano, but what I did to fight the cyano. My cyano was due to high nutrient levels from heavy feeding, heavy loading, and reduced water changes. I battled it for a few months with reduced feeding, reduced lighting, and excessively vacuuming in the DT. The weekly water changes were doubled and all water removed was by vacuum. I also heavily cleaned cleaned my primary fuge at one point.
The cyano got to a severe point at which time I tried Chemiclean. The Chemiclean did the trick on the cyano, but there were other consequences from my own actions. Before adding Chemiclean I did a huge water change per directions. The problem was that I cleaned my secondary fuge before adding Chemiclean - at that time one third of the system volume.
I had never cleaned my secondary fuge/storage before and it was slap full of detritus. I meant to take it offline first with the valves set up for that exact purpose but forgot. I stirred everything up when I cleaned it - removing and rinsing all rock and vacuuming all sand. Even with a vacuum I could not see my hands in the tank. I am fairly certain this massive nutrient release coupled with the immediately reduced bacteria filtration was my system’s demise - not the Chemiclean.
My pH shot up, reaching higher numbers than I have heard of in marine systems, which took its toll on many inhabitants - over half of them. To make matters worst my ph probes had drifted out of calibration, so I did not identify the problem at first.
After realizing my mistake and taking appropriate actions, everything settled down in a few weeks. I calibrated my probes, resumed increased water changes, used vinegar to bring the pH down. I am now back to normal water changes but The pH never balanced out correctly - I still dose a lot of vinegar to this day. I setup my apex to turn off the lights if the pH gets too high and to dose vinegar if it gets higher. I also took my 240 gallon secondary fuge offline, primarily to reduce the water change volumes.
Not a drop of cyano remains and the tank, rocks, sand, etc are always crystal clean other than the never ending bacteria strings formed by heavy vinegar dosing. The lights go off a few times a day and I use almost a gallon of vinegar every week in my-now reduced 400 gallon system.
I am not sure this is helpful, but that is my nightmare experience with cyano, or more so with wildly excessive cleaning. Be careful how aggressive you get with cleaning. I am not promoting Chemiclean here, just advising caution with excessive cleaning.
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