PRODACTEST KH - How to check carbonate hardness with Prodactest

Описание: PRODACTEST KH carbonate hardness
Carbonate hardness (expressed in °KH) indicates the presence of carbonates and calcium and magnesium bicarbonates and constitutes a part of the so called total hardness (expressed in °GH). A more modern and correct indication, which however is not so widespread in the aquarium world, designates, instead of carbonate hardness, this value as “buffering capacity of acidity up to pH 4.3” in mmol/l, where 1 °KH is equal to 0.36 mmol/l.
Carbonate hardness holds special importance in the chemical equilibrium of water due to its tight relation with the pH value and carbon dioxide.
Due to this reason, checking it becomes most important both in fresh water for plant cultivation and for the breeding of delicate fish or those coming from soft water.
In fresh water, carbonate hardness should possibly reach 4° (lower values render the pH value extremely unstable, while a higher value could create problems to plant cultivation). In sea water, carbonate hardness should reach about 8° KH till about 10° KH.
In order to lower the carbonate hardness in fresh water (often necessary because drinking water is always harder) it is possible to filter it through peat or through a treatment with synthetic resins (it is possible to use MUTACAL PRODAC directly in the filer) or a reverse osmosis system.