50X Chlorine Dip Test Strip Hot Tub SPA Swim Pool Water PH Tester Strips Paper#M
Easy to test: Free Chlorine/Bromine ,pH,Total Alkalinity. Total Alkalinity Test Range: 0~240ppm. Free Chlorine Test Range: 0~10ppm. 50pcs/bottlex Multifunctional 3-in-1/5-in-1/6-in-1 Swimming Pool Test Papers（decide your choice ）.