The Insta-Test PLUS® Pool & Spa Test Strips 1-dip formula that allows the user to simply dip the strip into the water to receive accurate, instant results. The new formula is designed for stable color development to allow adequate time for the user to match very distinct colors along with preventing cross-contamination between pads.No required waiting period!Available in 4 different models:Insta-Test 3-Way Plus Model #2976-12 50 test strips The Insta-TEST 3 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Alkalinity 0-240 ppm, and pH 6.2-9.0 Insta-Test 4-Way Plus Model #3032-BC-12 50 test strips The Insta-TEST POOL 4 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Total Alkalinity 0-240 ppm, pH 6.2-9.0, and Cyanuric Acid (Stabilizer) 0-250 ppm Insta-Test 5-Way Plus Model #2977-BC-12 50 test strips The Insta-TEST 5 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Chlorine 0-10 ppm, Total Alkalinity 0-240 ppm, pH 6.2-9.0, and Total Hardness 0-800 ppm Insta-Test 6-Way Plus Model #3028-BC-12 50 test strips The Insta-TEST® 6 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Chlorine 0-10 ppm, Total Alkalinity 0-240 ppm, pH 6.2-9.0, Total Hardness 0-800 ppm, and Cyanuric Acid (Stablilizer) 0-250
