Test for measuring the calcium in aquamarine
Calcium is essential for the stability of pH and carbonate hardness (KH) of 'water. Many invertebrates, such as corals, snails, mussels, etc. need calcium to form their skeletons. Similarly, the deposit purple on the stones, which is formed by calcareous algae and that is very sought after, uses large amounts of calcium.
A permanent high calcium concentration is also necessary to secure the favorable fisfato algae.
In the natural state, the concentration of calcium in 'sea water is approximately 450 mg / L.
A test adjust the amount of calcium present will allow to adjust the dosage for its compensation.
Detailed instructions in Italian and color scale inside.