Features: 1. 6 in 1 Pool and Spa water quality test strips.Tests for Free Chlorine, Free Bromine, pH, Total Alkalinity, Total Hardness and Cyanuric Acid. 2. Easy to use.Test at both ends of pool twice a week for best results. 3. This strip is easy to use, help you easily know your water quality in main 6 indicator. 4. Quantity:50 Pcs/Bottle, meet long term needs. 5. Test Range:Total hardness: 0 -1000, Total chlorine range: 0-10, Cyanuric Acid:0-240, Free bromine range: 0-22, PH range: 6.8-8.4, Total alkalinity: 0-240. Notice:Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement. Specification: Type:Swimming Pool SPA Test Strips Quantity:50 Pcs/Bottle Test Range: Total hardness: 0 -1000 Total chlorine range: 0-10 Free bromine range: 0-22 PH range: 6.8-8.4 Total alkalinity: 0-240 Cyanuric Acid:0-240 Package Includes:1 bottle(50pcs) x swimming pool test strip