Swimming Pool Water Quality Three-in-one PH Test Paper Water PH Test Strip Description: pool test strips can be used to test pH, total chlorine, free chlorine, total alkalinity, cyanuric acid, total hardness, etc., with more of features that other test strips and liquid test kits Immerse the test paper in water for 2 seconds, leave it in the air for about 15 seconds, and then match the color of the tape to the back of the bottle. In just 17 seconds, you can read the data The quality of the pool water should be tested once a week. Our test strips include 50 pool test stripsf, for long-term storage. Test strips for pools, spas, spas Test the quality of the water, you can ensure the quality of the water in the pool to avoid health problems and damage to property Notice: 1. The actual color of the item may be slightly different from the images displayed on the website due to many factors such as the brightness of your monitor and the brightness of the light. 2. Allow a slight deviation for the measurement data. 3. There may be an error of 1-3 cm. Package includes: 50PCS 3 IN 1 PH Test strips. cleaning supplies tools herramientas tool set Cleaning Supplies Tools Herramientas Tool Set Hand Tools