That is likely. I have put in the CYA in a sock so I am waiting for it to dissolve. I think I will add 1/2 gallon of Muratic tommorow and then I wait a few days and get another test. All I am realy trying to acomplish is to lower the runtime and percentage on my SWCG so it will last a few years. Everyones help on this site has been awesome. Thanks to all. After next test I will post results and proceed with the suggestions I receive here.