So far the pH readings on the ePool have been consistent with readings at two different pool stores (another Leslie's location was pretty far off), on several different occasions during the last month and a half. It doesn't give a definitive chlorine level actually, just <1, ~1, >2, so I'll just test specifically for that myself once I get the water clear again. The last time I shocked the pool was with a dichlor instead of the cal-hypo and I did notice a drop in the pH (although minor). I have bleach and borax on my shopping list for later, so I'll probably start supplementing my chlorine levels with bleach instead of relying on the chlorinator. I see that has contributed to an increase in the CYA as well.