Calcolo durezza acqua

The label present in the bottles of mineral water identifies all the elements and characteristics of this including the presence of calcium and magnesium salts expressed in mg / liter. For a conscious consumption and for a responsible choice, the total hardness of a mineral water can be calculated, expressed in French degrees (° F) and in German degrees (° D), simply by entering the concentration of calcium and magnesium salts ( mg / liter).