The Insta-TEST® 5 Plus pool & spa strip measures Free Chlorine, Total Chlorine, Bromine,Total Alkalinity, pH, and Calcium Hardness   

Tests for:  Total Bromine, pH, Total Alkalinity and Total Hardness. Our Bromine strips include a test for Total Hardness since warmer temperatures increase the potential for scale build-up, making it particularly important for spa owners to maintain proper hardness levels.