Description: When chlorine levels and pH drop, it can lead to diarrhea and ear and skin infections. A good pH level of chlorine protects against bad bacteria: if the pH rises too high, the germ-killing power of chlorine is depleted. Chlorine can also be eaten if a lot of nitrogen (from debris, urine, sunscreen, or sweat) or other organic matter gets into the pool. Therefore, it is best to test the chlorine level and pH all the time - they can change from day to day depending on the use of the pool. Keeping the pH level within the proper range is important to maintaining the intact equipment and finish of the pool. Your chlorine will dissolve faster at low pH levels. The high pH level makes the chlorine inactive. Characteristics: Indispensable tool for quick and accurate chlorine ph readings as chlorine is the most used water disinfectant, killing bacteria, algae and microorganisms. The perfect tool to keep your pool or spa within safe chlorine and PH ranges, no more chemicals or speculative work. PH and Chlorine (Cl2) Water Electrotester for routine monitoring of pH and chlorine levels in swimming pools, spas and various water sources. Save time and money with this electric tester. It has only one switch, easy to use, simple one switch design for pH and CL2 testing. Specification: Material: ABS Color: As Picture Shown! Main unit: approx. 190X20mm / 7.5X0.8in Chuck probe: approx 150mm / 5.9in (L) Probe (only): approx. 48 mm / 1.9 in (L) Cable (only): approx. 300 mm / 11.8 in. (L) Recommended chlorine levels for pools and spas are 1.2 to 1.7 ppm The recommended pH level for pools and spas is 7.2 to 7.8 Package List: 1 x PH / CL2 meter 1 x Manual Note: The detector does not recommend submersion, with the exception of pool or spa water.