Description
This solution is sodium thiosulfate, a chlorine neutralizer. Add five drops of Solution 2, a phenol red indicator, and mix by gently swirling. Compare the color with the pH color standards on the plastic tester to determine the pH level of your pool water
PH (acidic/basic) : 7.2 – 7.6
CL (Total & Free Chlorine) : 1 – 3 ppm
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