Aquadur 100 test strips

The hardness of the water is due to the content of calcium and magnesium salts. In the determination of water hardness is the sum of all detected above salts.

It is expressed in mmol / l or more common in the older terms such as German, English and French degrees of hardness.

In addition to the above-mentioned degrees of hardness to water often judged by terms such as "soft water", "hard water" etc. The following is a comparison of ° d and these general terms:

• <3 ° d - very soft water
• <7 ° d - soft water (hardness I)
• <14 ° d - moderately hard water (hardness range II)
• <21 ° d - hard water (hardness range III)
• > 21 ° d - very hard water (hardness IV)

The hardness of the water is often of interest also there where no special laboratory water is available. The sensitivity of AQUADUR® is sufficient for orienting water hardness provisions of establishments of the textile industry in dyeing, laundries, water plants and boiler houses, with fish breeders, aquarium owners and also in households.