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One step, one minute, phosphate test! Even very low levels of phosphate can feed algae and create problems in pool water. Easily add one of the powder pillow reagents to the testing vial with a sample of your pool water and compare to the color chart. You will have your results in one minute! For a clean and healthy pool, make sure you test the water at each end at least twice a week! Each bottle provides 20 tests.
