Certikin 50 strips for free chlorine/pH/total alkalinity/cyanuric acid
ests for Free Chlorine, Cyanuric Acid, pH and Total Alkalinity 50 strips per bottle
Just dip an AquaChek Yellow strip in your pool or spa water for one second, and remove it immediately. You get test results in 15 seconds
To keep your pool at its best, test at each end a minimum of twice a week, and test your spa before each use. Its also a good idea to write down your results each time you test.