Upgrade 14 in 1: Test total alkalinity, pH, hardness,, copper, iron, total, chromium/chromium (VI), bromine, nitrate, nitrite, residual, fluoride, cyanuric acid. Total Alkalinity (0 - 400 PPM). Easy to use: Dip the drinking water test paper into the water for 5 seconds, keep it in the for about 30 seconds, and then adjust the of the back of the bottle to get the reading.
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