Thank the good Lord for 3.88 " of rain in Mesquite, Texas!! In anticipation, I bumped the chlorine up to 8 ppm last night. I carry a CYA of 40 and target 5 PPM on a daily basis. We had to drain four inches this evening because the water was up to the coping -- PH is 7.5; FC is 5 PPM, CC is 0...