Richard,

Thank you so much! It was your previous comments on the feasibility of low TA with high CH water that gave me the courage to try to fool with the chemistry. I'm glad I did! I test my water myself, but so does the pool store when I go for a visit. This is a local store that maintains pools on their service with liquid chlorine. They completely concurred and understood Ben's method for lowering TA. It sounds like they use this method too. I am steering friends who are looking for a good pool store to this one from now on! The owner was a little concerned about the TDS of the water, but the CH has changed so little in the 3 years I have owned the pool that I am not really concerned.

I use an swg for chlorine. Are you proposing that I turn that off and switch to bleach? I could probably repeat the lower ph/aerating method and get the TA down even further. If I do the adjustment for stabilizer that others do, I am already there.

Maybe we should move this to a new thread....