Dip Test Strips are a quick and easy way to check chemical levels in your above ground pool or hot tub. Using the chlorine, alkalinity and pH testing strips to check water balance enables you to identify what chemicals need to be added to bring them within the correct parameters. Untested water can become a breeding ground for beastly bacteria or develop a chemical imbalance that makes eyes and skin feel uncomfortable. Quickly measure pH, Chlorine and Alkalinity Identify any necessary chemical adjustments Reliable and accurate readings Easy to follow instructions Measures: pH Measure the pH levels of your water to so you can ensure the water is safe and comfortable to use. pH levels should be 7.2 7.6 Chlorine Ensure you have the correct amount of chlorine in your pool or hot tub to help prevent bacteria and harmful organisms. Chlorine levels should be 1-3 mg\/litre (ppm) for pools and 3-5 mg\/Litre (ppm) for hot tubs Total Alkalinity Measure the total alkalinity levels to help prevent your water becoming corrosive. Levels should measure 80 100 ppm or 100 120 ppm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia