sorry - I haven't been testing my Ca since the first time as I "assumed" it was unnecessary with a vinyl liner and I have no excuse as to why I didn't do the TA. I will do those tests this evening when I get home. I checked the chlorine this a.m. again with the "blue box" drops test and it still read 10+ so I'm not losing a lot of chlorine at night anyway.

I'll repeat all tests this evening. I am running the filter 24/7 (since Saturday)
We're expecting another 100 degree day today.

thanks for the response. Robin