In-ground, 24,000 gallon, Gunite. I just (tuesday the 25th) re-plastered... i.e., stripped old plaster (3 layers) to gunite. The Ph keeps creeping up... Thur, brought it from 8.2 to 7.4... Friday 8.0 to 7.4.. this morning 7.8. On Thursday the pool water testing place instructed me to put 2...