Tropic Marin KH/Alkalinity Test PROFESSIONAL Test

Measuring range: 0,1 – 20 °dH
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Resolution (accuracy): 0,1 °dH

The carbonate hardness (KH)* or alkalinity* of a water sample characterizes the buffering ability, ie the ability to maintain the pH value of the water. It is largely determined by the proportion of hydrogen carbonate ions in the water. As the pH value increases, other basic ions such as hydroxide ions also contribute to alkalinity.
Carbonate hardness should be checked very regularly in all aquariums. If the alkalinity in the aquarium is too low, a drop in the pH value (acid drop) can occur, which can be life-threatening for many fish and invertebrates. In reef aquariums, sufficient carbonate hardness is essential for strong coral growth. On the other hand, too high carbonate hardness in seawater tanks can lead to limescale precipitation and also have a negative impact on coral growth.
*In water chemistry there are several terms to describe the buffering ability with different definitions. The term “carbonate hardness” is used in aquaristics; However, the alkalinity is measured. In this test both terms are used interchangeably.
The carbonate hardness is usually given in degrees of German hardness (°dH). A table for conversion into other common units (such as the equivalent unit milllival per liter (mval/l) or the amount of substance in mmol/l) can be found on the cover page.
In the oceans, the carbonate hardness is 6,5 °dH. In a saltwater aquarium, the carbonate hardness should be between 6 and 9 °dH. In freshwater aquariums, the carbonate hardness should not fall below 3 °dH. The optimal value for alkalinity in a freshwater aquarium depends on the species of fish and plants to be maintained. Ask your specialist dealer about the correct carbonate hardness for your pool.

10mL Reagent A
50mL Reagent B
1 glass cuvette 10 ml
1 dosing syringe 5 ml
1 dosing syringe 1 ml with attachment
1 instruction manual