Page 1: ...calculate the Hardness of DROPS 5 ppm CaCO3 1 ppm 1 mg L 0 1 f 0 0556 D 0 07 E TABLE 1 HARDNESS OF WATER Drops 1 16 very soft 17 32 soft 33 medium NOTE ppm is milligrams CaCO3 per Liter f French Degrees D German Degrees E English Degrees To measure Hardness Medium Range use HI 3841 Test Kit Hardness High Range use HI 3842 Test Kit Historically water hardness had been defined by the capacity of wat...
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