100pcs Chlorine Dip Test Strips Hot Tub SPA Swimming Pool PH Tester Paper 3in
Easy to test: Free Chlorine/Bromine, pH, Total Alkalinity. Total Alkalinity Test Range: 0~240ppm. Quantity: 100pcs( 2 bottles). Free Chlorine Test Range: 0~10ppm. -Test at both ends of pool twice a week for best results.