Swimming Pool Chlorine Test Strips by AquaChek. These test strips test for four key values Free Chlorine, Cyanuric Acid, pH and Total Alkalinity. A quantity of 50 strips per bottle. To test the water, just dip an AquaChek strip in the pool water for one second, and remove immediately. Compare the colors on the stip to the bottle, thats it! You get test results in seconds! To keep your pool at its best, test each week. It's also a good idea to write down your results each time you test, so you can track changes.