Patent on removing CYA from the water


TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
While that does work in principal, it works out very very poorly in practice. There was a product based on that patent, but it was very expensive and tended to leave the pool cloudy in a way that was very difficult to clear up. They eventually took it off the market.


Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
Tucson, AZ
I believe the cya test is a similar (same?) process. Turn the pool cloudy then try to filter it out. Does not sound like it worked very well or they would be billionaires.