2 Pack – Aquachek One Minute Phosphate Pool & Spa Test – 562227

These phosphate tests use the most accurate method for phosphate testing: a one step, one minute, phosphate test. Two bottles with 20 tests per bottle. Even very low levels of phosphate can feed algae and create problems in pool water. Test for phosphate once a week as the concentration in the water can increase rapidly due to rain, debris or bather load. Results in a minute! For a clean and healthy pool, test the water at each end a minimum of twice a week! 1 Buy = 2 bottles!