Easy to test: Free Chlorine/Bromine ,pH,Total Alkalinity. Total Alkalinity Test Range: 0~240ppm. Test at both ends of pool twice a week for best results. 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 ）.
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