I'm new to this forum and my pool is new as well. Yesterday my pH was 8.2 and TA was 70. I used pool math and added the recommended dosage of Muriatic acid; tested again today but there was no difference. I added more acid than the calculator recommended and after some hours my pH had dropped to 7.2 and TA 60.
The rest of my test results are:FC 6ppm, CC 0, CYA between 40 and 50 (2 tests), CH 850. (I don't know why CH is so high, my tap water is 75).
Should I increase my TA using baking soda as recommended by Pool Math, to keep my CSI above -0.6. to avoid problems with the plaster? Is the CSI calculated by pool math accurate?
This site has helped me a lot in getting started. Thanks to all of you who keep this forum active.