Description:Hot Tub Test Strips can test total chlorine, Ph, total alkalinity. Total chlorine, detection range 0-1-3-5-10; PH, test range 6.8-7.2-7.4-7.6-8.0-8.4; total alkalinity , the test range is 0-40-80-120-180-240. Just soak in water for 2 seconds; Then take it out,no need to shake excess water off and hold the test strip horizontally for 15 seconds; Compare with the color chart on the bottle to obtain clear and accurate water quality results. Specification:Name:Pool Test StripsQuantity: 100Test Range:Residual chlorine test range: 0-10ppmpH test range: 6.8-8.4Total alkalinity test range: 0-240ppmPacking list:100*3 in 1 Pool Test StripsNote:1.Due to the lighting effects and shooting angles, there is color difference in the product, please understand.2.Due to manual measurement, there is a tolerance in the product size.