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Salifert KH / Alkalinity Test Kit

Salifert KH/Alk Test Kit

SKU: T816

The Salifert KH/Alk Test Kit offers a precise method for monitoring alkalinity levels, critical for coral skeletal formation and pH stabilization. With a sensitivity to small changes in alkalinity, measuring in steps of 0.1 meq/L or 0.3 dKH, it ensures accurate readings and allows for timely adjustments. The kit provides a sharp color change, facilitating easy detection of subtle alterations. Capable of performing approximately 100 to 200 measurements, it enables aquarists to maintain stable alkalinity levels within the optimal range. Additionally, Salifert's KH + pH Buffer simplifies alkalinity correction without disrupting pH balance, ensuring a healthy aquatic environment.

Salifert KH/Alk Test Kit

How often do you test your Alkalinity?

Calcium is not the only substance needed to form the skeletal material of corals and allow calcareous algae to grow. Carbonate and bicarbonate are also needed and these two substances can have a major effect on stabilizing or buffering pH levels in the aquarium in the correct range of 8.1 to 8.4.

The total carbonate and bicarbonate concentration is also called alkalinity or carbonate hardness and for a stable system the alkalinity should not fluctuate by more than 5% from the optimum level of approx. 2.8 meq/L i.e. a maximum fluctuation of 0.14 meq/L.
The Salifert test is sensitive enough to detect small changes in levels of alkalinity, measuring in steps of 0.1 meq/L and demonstrating a very sharp color change.


The Salifert KH/Alk test is very straightforward. It measures in sufficient small steps of 0.1 meq/L or 0.3 dKH  with a sharp color change. This makes detection of important yet small change possible.

The kit can perform approx. 100 - 200 measurements.


The Salifert KH + pH Buffer makes correction of the alkalinity or carbonate hardness simple and does not upset the pH of the system. Within 24 hours it will acquire the pH corresponding to other aquarium parameters. Should the pH remain low within 24 hours of corrective measures then an insufficient gaseous exchange (inefficient aeration) is quite often the cause.

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