Feature 16 in 1: Water test strips can simultaneously test 6 kinds of data, total hardness, total alkalinity, cyanuric acid, total chlorine, free chlorine, pH. 2Easy Comparison: Just compare the test paper with the color card on the bottle, then you can know how to adjust the water quality. 3Widely Use: Pool test strips suitable for any water source, provide accurately and quickly results, suitable for swimming pool and hot spring water. 4Package Included: A total of 50 pieces water test strips, with high accurate and 1 year shelf life, which is convenient for you to use for a long time. 5Easy Storing: Pool test strips adopted a bottle packaging design, and tin foil inner bag, waterproof and easy to store, can ensure long term use.Item Type: Water Quality Test StripsMaterial: PETQuantity: 50pcs / BottleShelf Life: 1 YearTest Time: 30sTest Elements: Total Hardness, Total Alkalinity, cyanuric acid, total chlorine, Free Chlorine, pHApplicable Scope: Pool water, hot spring water .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List50 x WaterTestStrips1 x Bottle