Features:1.6 in 1 Pool and Spa water quality test strips.2.Tests for Free Chlorine, Bromine, PH, total Alkalinity, total Hardness and Cyanuric acid.3.Test at both ends of pool twice a week for best results.4.Easy to distinguish. Color difference is obvious, easier to compare the strip color to the color chart.5.Dip in water for instant reading and comes in easy-to-store container.6.Perfect for swimming pool and spa test.Descriptions:1.This strip is a good way to easy understand your water quality in main six indicator(TC, CL, PH, ALK, CYA, TH).Specifications:Type: Swimming Pool SPA Test StripsMaterial: PaperColor: WhiteTest: TC, CL, PH, ALK, CYA, THQuantity: 50 pcs/bottleTest Range:Total Chlorine Test Range: 0~10ppmFree Chlorine Test Range: 0~10ppmPH Test Range: 6.8~8.4Total Alkalinity Test Range: 0~240ppmTotal Hardness Test Range: 0~1000Cyanuric Acid Test Range: 0~240Package Informations:Package Size: 100x40x40mm/3.9x1.56x1.56inPlastic Box PackagePackage Included:1 x Swimming Pool SPA Test Strips(50pcs/bottle)