AquaChek 7-in-1
pH reading of 8.4
Critical high
What it means
pH at 8.4 makes chlorine 60 percent less effective. Likely scale formation on tile and equipment. Cloudy water often follows.
What to do
Add acid in 2 to 3 smaller doses across the day, not all at once. Lower alkalinity in parallel if it is above 150 ppm. Re-test after each dose.
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