Quote Originally Posted by mwsmith2
There was also mention of how high CYA levels lead to plaster erosion too. That's why I shy away from it. I do remember Ben discussing talking about running high CYA levels, but it seems to me that was more for folks on bleach who wanted to only mess with their pool once a week?

Michael
My brother the Masters in electro-chemistry says the higher CYA levels are required to allow for more free chlorine to be produced based on the salt content. It's that old cathode-anode thing I guess. I dropped out of P-chem 20 years ago cause it had too much calculus or I could explain it better...