Grand Index PC101 swimming pool water tester Chlorine Tester PH value;Quick test for water PH and CL2 Levels Recommended chlorine level for pools and spa is 1.2 to 1.7ppm Recommended pH level for pools and spa is 7.2 to 7.8 Quick test of water pH and Cl2 levels Chlorine calibration for more accurate testing No chemical testing and solutions needed