Hach 145300 Total Hardness Test Kit, Model 5-B electronics3 attracting people's attention to enjoy

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Hach 145300 Total Hardness Test Kit, Model 5-B electronics3 attracting people's attention to enjoyHach 145300 Total Hardness Test Kit, Model 5 B Product Features Trust the original Hach test kit! Simple drop count titration measures hardness as CaCO3 (1 gpg = 17. 1 mg L). Utilizes drop count titration with a range of 1 30 gpg. Contains approximately 100 tests. Drop count titration a simple, economical titration method!