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6-in-1 testing: Measures Total Alkalinity, pH, Cyanuric Acid, Free Chlorine, Bromine, and Total Hardness. Quick and easy: Just dip, wait a few seconds, and compare to the colour chart. Ideal for pool and spa use: Helps you treat your water accurately and avoid overuse of chemicals. Accurate readings: Provides essential information to maintain water clarity, comfort, and safety. 50 test strips per pack: Ample supply for regular testing and ongoing water care.