Test for measuring the carbonate hardness in aquamarine
The KH value indicates the buffer capacity of 'water. Also called "carbonate hardness" of 'water, expressing the ratio between the quantity of carbonates, bicarbonates and dissolved carbonic acid. The carbonate and bicarbonate salts are carbonic acid.
Depending on the pH, they can be transformed 's in one' another and even react to form dell 'carbonic acid. When the pH is high, it is noted almost solely the presence of carbonate. Instead, when the pH is low, it mainly detects the presence of carbonic acid dissolved.
In the presence of an ideal pH for most fish this mainly contains bicarbonate.
The value of KH indicates the amount of carbonates and bicarbonates fixed to calcium and magnesium. These last two are the total hardness of 'water value or GH.
Detailed instructions in Italian and color scale inside.