5 in 1 Water quality testing strips for hot tubs, swimming pools or spas. Easy, accurate and quick detection of pH, Free Chlorine/Bromine, Total Alkalinity, Cyanuric Acid and Total Hardness. 100 count100 water quality testing strips: Includes 100 dip test strips that make caring for your hot tub, spa or pool quick, simple and easy. Water quality should be tested at least every week, and more frequently under heavy usage. 5 in 1 Measures five essential water quality characteristics: pH, Free Chlorine Bromine, Total Alkalinity, Cyanuric Acid and Total Hardness to ensure your hot tub is safe, clean and ready to use anytime. Our specially designed 5