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3-in-1 Testing: Monitors Free Chlorine/Bromine, pH, and Total Alkalinity in seconds. Fast & Easy to Use: Just dip, wait a few seconds, and compare to the color chart. Accurate Results: Helps prevent cloudy water, skin irritation, and equipment damage. Ideal for Hot Tubs & Spas: Designed specifically for the high-temperature environments of spas and jacuzzis. Convenient Packaging: Resealable container keeps strips dry and fresh for consistent results.