50PCS Chlorine Dip Test Strips Hot Tub SPA Swimming Pool PH Tester Paper 6 in1
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 ）.