Features: <br>Boasting high accuracy, simple operation, low price and easy carrying. <br> It can be used for rapid detection of PH and residual chlorine in swimming pool. <br>About residual chlorine and PH test. The ideal range of residual chlorine in the pool water is 1.0 to 1.5 ppm; the ideal range for the pH of the pool water is 7.2 to 7.6. <br>Usage for remaining chlorine testing: Wash the colorimetric tube with the water to be measured and pour it into the scale, add 3 drops of residual chlorine reagent, cover the lid and shake it upside down several times, and compare the reading of residual chlorine card. <br>Usage for PH testing: Wash the colorimetric tube with the water to be measured and pour it into the scale. Add 3 drops of pH reagent. Cover the lid and shake it upside down several times.Compare the PH color card readings. <br>Tips: Keep it out of children. Store in a cool and sheltered place. Please take water samples at depths below 40cm above the water surface. <br> <br>Specification: <br>Condition: <br>Material: Liquid <br>Box length: approx.13cm / 5.12in <br> <br>Package List: <br>1* Water test box <br>1* PH reagent <br>1* OTO reagent <br>1* Test bottle set <br>1* English user manual<br>1、Boasting high accuracy, simple operation, low price and easy carrying. <br>2、About residual chlorine and PH test. The ideal range of residual chlorine in the pool water is 1.0 to 1.5 ppm; the ideal range for the pH of the pool water is 7.2 to 7.6. <br>3、Usage for remaining chlorine testing: Wash the colorimetric tube with the water to be measured and pour it into the scale, add 3 drops of residual chlorine reagent, cover the lid and shake it upside down several times, and compare the reading of residual <br>4、Usage for PH testing: Wash the colorimetric tube with the water to be measured and pour it into the scale. Add 3 drops of pH reagent. Cover the lid and shake it upside down several times.Compare the PH color card readings. <br>5、Tips: Keep it out of children. Store in a cool and sheltered place. Please take water samples at depths below 40cm above the water surface.