50/100PCS Chlorine Dip Test Strips Hot Tub SPA Swimming Pool PH Tester Paper UK
Easy to test: Free Chlorine/Bromine ,pH,Total Alkalinity. Total Alkalinity Test Range: 0~240ppm. Free Chlorine Test Range: 0~10ppm. Test at both ends of pool twice a week for best results. pH Test Range: 6.8~8.4.