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3 in 1 chlorine / bromine check:1) Designed to offer user the 3 main parameters in pool and spa testing2) Measuring for free chlorine / bromine, pH, total alkalinity5 in 1 pool check:1) Designed to be a comprehensive testing solution2) Measuring for free chlorine / bromine, total chlorine / total bromine, pH, total alkalinity, and total hardness
Test Strip For Pool & Spa