100 pcs Test PH Chlorine Bromine Hardness Etc Accurate 7-in-1 Swimming pool test paper Description: The pool test paper can be used to test pH, total chlorine, free chlorine, total alkalinity, cyanuric acid, total hardness, etc. It has more functions than other test papers and liquid test kits. Soak the test paper in water for 2 seconds, place it in the air for about 15 seconds, and then match the color of the tape to the back of the bottle. You can read the data in just 17 seconds The quality of swimming pool water should be tested once a week. Our test strips include 100 swimming pool test strips, which can be stored for a long time. The test strips of swimming pools, spas, and spas test the water quality, which can ensure the water quality in the swimming pool and avoid health problems and property damage. note: 1. Due to many factors, such as the brightness of the display and the brightness of the light, the actual color of the item may be slightly different from the image displayed on the website. 2. The measurement data has a slight deviation. 3. There may be an error of 1-3 cm. The package includes: 1x100PCS 7 IN 1 PH test strip