Two quick questions:
Can CYA level drop quickly, and if so, how?
-Upon opening, the CYA was only 5. We added using the sock method to get CYA to 40, and my own test and the pool store test verified the CYA level was in fact 40 (same results). I had the pool store run one because that's a tricky test to see well. However, I checked CYA yesterday it I could see the black dot when filling it all the way. The pool store's tester showed CYA at 40 again though.
What is my target TA?
-Poolmath says 50-90, with 60-80 being ideal, but I feel as though I've read here somewhere that I should be between 100 and 125?
Can CYA level drop quickly, and if so, how?
-Upon opening, the CYA was only 5. We added using the sock method to get CYA to 40, and my own test and the pool store test verified the CYA level was in fact 40 (same results). I had the pool store run one because that's a tricky test to see well. However, I checked CYA yesterday it I could see the black dot when filling it all the way. The pool store's tester showed CYA at 40 again though.
What is my target TA?
-Poolmath says 50-90, with 60-80 being ideal, but I feel as though I've read here somewhere that I should be between 100 and 125?