Dirvin 7 in 1 Pool and Spa Test Strips, 100 Strips for Hot Tub and Swimming Pool, Accurate Test Total Hardness, Free Chlorine, Bromine, Total Chlorine, Cyanuric Acid, Total Alkalinity, pH

["【7-in-1 Accurate Water Testing】：Dirvin 7-Way Pool and Spa Test Strips provide fast and reliable testing for seven key water parameters including Total Hardness, Free Chlorine, Bromine, Total Chlorine, Cyanuric Acid, Total Alkalinity, and pH. This comprehensive pool test kit helps maintain balanced, safe, and crystal-clear water in swimming pools and hot tubs","【Easy to Use】： 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","【Ideal for Pool, Hot Tubs & Spa】：Designed for versatility, these water test strips work for swimming pools, hot tubs, spas, and jacuzzis. They are suitable for residential pools, inflatable pools, and spa maintenance, helping ensure clean and properly balanced water for a better swimming experience","【High-Quality And Accuracy Test Strips】: Each test strip is crafted from premium fiber paper and no-bleeding pads, delivering high accuracy and convenience, meet routine water quality monitoring needs throughout the entire swimming season","【Tips】: Do not handle the test strips with wet finger. Read under natural light for best results. Store in a cool, dry place.Valid for 2 years from the date of manufacture. Please use up within 90 days of opening the product"]