This conducts three important tests in just 1 dip- Free Chlorine, pH and Total Alkalinity. AquaChek Yellow is blister packed with an illustrated instruction sheet featuring Dr.H.Tueau.

To keep your pool at its best, test at each end a minimum of twice a week, and test your spa (hot tub) before each use. It’s also a good idea to write down your results each time you test.