Keep your swimming pool, hot tub, or spa water pristine with Shatchi Blue Sparkle 3 in 1 Dip Test Strips. These convenient strips make water care simple, accurately measuring key levels of chlorine, pH, and alkalinity. Understand your water quality at a glance and know exactly what chemicals are needed to maintain a safe and healthy swimming environment, preventing harmful bacteria. Simply dip the strip, hold level for 15 seconds, and compare the colour results to the easy-to-read guide on the packet. Approved to UK guidelines, these test strips offer a quick and reliable way to ensure your water is balanced and clean. Suitable for swimming pools, hot tubs, and spas. Product Summary: Swimming pool test strips Hot tub test strips Spa test strips Water quality testing Chlorine test PH test Alkalinity test 50 pack