I am currently doing the shock process on the pool due to cloudy water after a heavy storm, following strictly the "how to shock" instructions. Started yesterday, had a pH of 7.5. All summer I have had no problems with the pH. Today all of a sudden the pH is reading 8.2+. Could adding all the bleach during the shock process increase the pH? Will follow the pool calculator and add muriatic acid today.
Second question is how important is the CH? It is testing only at 50. concrete bottom pool. Can I add this during the shock process or should I wait? could the low CH affect the clarity of the pool water?
FC 28 checking every 2 hrs
TA 80 (was 60 2 days ago)
CYA 40 (keep trying to raise this every week, won't seem to budge)
test kit tf 100, 40x20 approx 24,000 gal. sand filter.