Description 1. Swimming pool and spa water should be disinfected and sterilized with chlorine, and the pH value affects the role of chlorine. If the pH is too high, the use of chlorine will fail. If the pH value is too low, the chlorine dissolves too quickly, and there is no way to disinfect and sterilize well. When chlorine and pH are out of balance, pool water can easily cause diarrhea, ear and skin infections. 2. The 2-in-1 function of the CL2 pH Chlorine Water Quality Tester enables it to test both pH value and chlorine status. The operation is simple and quick, and the data is accurate and easy to understand, which can save you more time and money and make your swimming pool. Has a safe pH and chlorine value. 3. The recommended chlorine content for swimming pools and spas is 1.2 to 1.7 hours, and the pH is 7.2 to 7.8. If your pool or spa water quality is not within this range after the test, you need to adjust the pH and chlorine content of your water. 4. Note: It is not recommended to put the water quality test equipment in water other than swimming pools and spas.