Test your water hardness with the Water Hardness 5B Test Kit to determine the best water treatment approach for your needs.
Water Hardness 5B Test Kit
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Trust the original Hach test kit! Simple drop-count titration measures hardness as grains per gallon CaCO₃ (1 gpg = 17.1 mg/L). Utilizes drop count
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Hach Water Hardness Single Parameter Test Kit
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