1.Valuable test strips: This water test kit contains 50 test strips. Test strips can test total alkalinity, pH, chlorine, total hardness, cyanuric acid and total chlorine. 2.Easy to use: the pool test strips are submerged in water for 2 seconds, left in the air for about 60 seconds and then match the colour of the strips. Data can be read in just 60 seconds. 3.High precision: pool and spa test strips are made of highquality PP material. No need to shake off excess water and just follow the instructions, you will get the exact results. 4.Cleanliness test: It is recommended to test twice a week at both ends of the pool to achieve better results and let you know if the pool water is in a y and clean condition. An effective and accurate method of testing water for commercial and residential applications.