Other information
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13.3
Hardness ranges
The hardness ranges were classified according to the German Act on Detergents and
Cleaning Agents published in 2007.
Hardness range
°dH
°fH
Soft
< 8.4
< 15
Medium
8.4 – 14
15 – 25
Hard
> 14
> 25
► When dosing cleaning agents, take account of the new hardness range of your
water.