Salifert KH / Alk test kit, for freshwater and marine aquarium

6,98 €

Alkalinity / KH test for freshwater and saltwater aquarium, with a resolution of 0.1 mEq/L (0.3 dKH).

in stock

The Salifert KH/Alk test is very easy to use and precise. With this test you can measure small steps of 0.1 meq/L (0.3 dKH), obtaining a sharp color change when the KH value is reached. This way you can detect small yet important changes in the aquarium water, and make the cessessary changes to replenish alkalinity.
The reagents included in this test kit are enough to perform approx. 100 - 200 measurements.

Alkalinity in marine aquariums

Calcium alone is not enough to form the calcareous substance that corals and calcareous algae need to grow. Some other substances are needed as well, among which are carbonate and bicarbonate. These two anions also play a huge role on the stabilization of the pH within its proper range of 8.1 – 8.4. Such stabilization is due to their behaviour as buffers.

The sum of carbonate and bicarbonate concentrations is also commonly called carbonate alkalinity or carbonate hardness. The only difference between alkalinity and carbonate hardness is a conversion factor. Natural sea water has an alkalinity of approx. 2.7 meq/L, equivalent to approx. 7.5 dKH when expressed as carbonate hardness. For a stable system the alkalinity or carbonate hardness should have a value similar to natural sea water or slightly higher. One should try alkalinity values not to fluctuate more than 5% between water changes. This means a maximum fluctuation of 0.14 meq/L or 0.4 dKH. Therefore an alkalinity test kit should be capable in measuring in steps smaller than 0.14 meq/L.


Specific References


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