Chemiclean, While It does work, Cyno seems to always reappear without any clear reason as to what Is causing It. I have had one specific area In my 185 that has had multiple outbreaks of Cyno, I have tried all the remedies Including adding direct flow to that area with an extra Tunze. It will go away then reappear at a later date regardless Of what treatment I've used. A combination of removing and treating plus extra flow seems to be the best way to control It, But an absolute cure would be better IMO.
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