50PCS Chlorine Dip Test Strips Swimming Pool Water SPA Hot Tub PH Tester Paper！
PH, total alkalinity, total hardness and cyanuric acid. Total alkalinity test range: 0~240ppm. Test free chlorine, bromine. Type: Swimming pool SPA test strip. Total chlorine test range: 0~10ppm. Free chlorine test range: 0~10 ppm.