For use with the AquaChek TruTest Digital Test Strip Reader. Each strip tests total and free chlorine, pH and total alkalinity. Just dip an AquaChek Silver strip in your spa (hot tub) or pool for one second and remove it immediately. Insert the strip into the meter and get fast accurate results! To keep your pool at its best, test a minimum of twice a week. It's also a good idea to write down your results each time you test, so you can track changes over time. 50 strips per bottle.

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