KH-Test Freshwater / Seawater TROPIC MARIN

KH Test Tropic Marin for Freshwater and Marine Aquariums

The KH Test Tropic Marin measures carbonate hardness, also known as alkalinity, in freshwater and marine aquariums. This value corresponds to the water's buffering capacity, essential for maintaining a stable pH.

Measurement Range and Accuracy

About Carbonate Hardness

Carbonate hardness or alkalinity of a water sample indicates the buffering capacity, that is, the water's ability to maintain a stable pH value. In aquariums, the term carbonate hardness is commonly used, although the measurement is of alkalinity. In this test, both notions are considered synonymous.

Carbonate hardness should be checked very regularly in all aquariums. Too low alkalinity can lead to a drop in pH, potentially lethal to many fish and invertebrates. In coral aquariums, sufficient carbonate hardness is essential to ensure vigorous growth of corals. Conversely, too high carbonate hardness in marine aquariums can cause calcium deposits and hinder coral growth.

In a marine aquarium, carbonate hardness should be between 6 and 9 °dH. In freshwater aquariums, it should not be less than 3 °dH. The optimal value depends on the species of fish and plants maintained.

Package Contents

Usage and Measurement Principle

The measurement is carried out by adding KH reagent drop by drop to a water sample until the color changes from turquoise to pink. The number of drops needed directly corresponds to the carbonate hardness expressed in degrees of German hardness.

To increase measurement accuracy, a larger sample volume can be used. In this case, each drop corresponds to half a unit of carbonate hardness.

Durability and Storage

The reagents can be used for 6 months after opening. They must be stored in a dark and cool place to ensure the reliability of the results.