Safe to chlorine based tablet pool, pH needs to be correct. If pool water is not balanced correctly then the chlorine won't be working at full strength killing.Light weight and easy to carry around, convenient to use, you can save time and money with this electrotester.Essential tool for quick and accurate readings of ph & chlorine as chlorine is the most commonly used for water by killing algae and microorganisms.Great tool for keeping your pool or spa within the safe Chlorine and PH ranges, no more chemicals or no more guessing work.An electrotester for testing pH and chlorine (Cl2) levels in water for routine monitoring of pH and chlorine levels of swimming pools, spas and different water sources.Condition: Brand NewItem Type: Water Quality TesterHost Size: Approx.Size: Approx. 190x120mm / 7.5x4.7inProbe with Handle Length: Approx. 150mm / 5.91inProbe Length: Approx.48mm / 1.89inCable Length: Approx.130mm / 5.12inWeight: Approx.259g/9.1ozBattery: 1 x AA alkaline battery 1.5V (Not included)Recommended chlorine content for swimming pools and spas from 1.2 to 1.7 ppm Recommended pH for pools and spas is 7.2 to 7.8phColour: white+greyMaterial: plasticPackage Contents:1 * Pool TesterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.