Simply dip into pool water & remove to compare chemical levels Use colour scale to check test results Indicates chlorine, pH & alkalinity levels of your water 25 x dip test strips in a pack Bestway Clearwater 25 x Dip Test Strips are a quick and easy way to check chemical levels in your above ground pool. Untested water can become a breeding ground for beastly bacteria or develop a chemical imbalance that makes eyes and skin feel like you’ve battled with a swarm of agitated bees. Testing pool water with the dip strips couldn’t be simpler. All you have to do is dip one of the water testing strips into a pool, quickly remove it, hold it horizontally and check the results on the handy colour chart that’s printed on the container. The chlorine test strips also highlight water’s pH and Total Alkalinity levels. There are three separate sections on each strip to indicate each individual level. Chlorine levels inside an above ground pool should be 1 - 3 ppm (3 - 5 ppm for spas), pH levels should be 7.2 - 7.6 and Total Alkalinity levels should measure 80 - 100 ppm or 100 - 120 ppm, depending on the chemical solutions used to treat a pool. 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.