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Hach Company Total Hardness Test Kit, Model 5-B
Supplier: Hach Company 145300
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 titration with a range of 1-30 gpg. Contains approximately 100 tests.
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