With a single dip, the strip tests Free Chlorine, Total Chlorine, pH, Hardness, Nitrate and Nitrite in less than 45 seconds. The Insta-TEST® 6-Way Test Strips are appropriate for both municipal and well water testing applications. Each bottle contains 25 test strips and is packaged in our exclusive pop-top vial with integrated desiccant liner and water-proof color chart on the label.