TROPIC MARIN - Professional KH Test (carbonate hardness)

Advantages :

• Measuring range: 0.1 – 20 °dH
• Accuracy: 0.1°dH
• For highly accurate determination of carbonate hardness in aquaria
• Sufficient for approx. 100 applications at 10°dH KH in water and 0.2°dH resolution / or 50 applications at 0.1°dH resolution
• The indication is given in degrees of German hardness (°dH) – conversion table for other units in the included instructions

For the determination of the very precise carbonate hardness (KH):

The carbonate hardness (KH) or alkalinity of a water sample refers to the buffer capacity, i.e. the ability to maintain the pH value of the water. In water chemistry, various terms describe buffering capacity with different definitions. In aquariums, the term "carbonate hardness" is common; the measurement relates to the alkalinity. In this test, the two terms are synonymous. As a rule, carbonate hardness is expressed in degrees of German hardness (°dH).

The carbonate hardness must be checked very regularly in all aquariums. Low alkalinity in the aquarium can lead to a drop in pH value that is fatal for many fish and invertebrates. In coral aquariums, the carbonate hardness must be sufficient to ensure vigorous growth of corals. On the other hand, too high a carbonate hardness in a saltwater pool can lead to lime deposits and harm the growth of corals. In a saltwater aquarium, the carbonate hardness should be between 6 and 9 °dH. In freshwater aquaria the carbonate hardness should not be less than 3 °dH.

Manual :