Carbonate hardness (KH) is one of the most important water parameters in the aquarium.

The majority of fish species kept in freshwater aquariums prefer relatively hard water. In addition, the KH acts as a buffer that prevents dangerous fluctuations in the pH value (including a drop in acidity).

The rule applies to all community tanks: a KH of at least 6 °dKH (significantly higher for special cases, such as African cichlids). This ensures the well-being of the fish and the aquarium water proves to be particularly resilient and easy to care for.

sera KH/pH-plus raises the KH precisely and sustainably to the desired value. The pH value is gently increased and, above all, safely stabilized.

Carbonate hardness (KH) is one of the most important water parameters in the aquarium. The majority of fish species kept in freshwater aquariums prefer relatively hard water. In addition, the KH acts as a buffer that prevents dangerous fluctuations in the pH value (including a drop in acidity). The rule applies to all community tanks: a KH of at least 6 °dKH (significantly higher for special cases, such as African cichlids). This ensures the well-being of the fish and the aquarium water proves to be particularly resilient and easy to care for. sera KH/pH-plus raises the KH precisely and sustainably to the desired value. The pH value is gently increased and, above all, safely stabilized.