A balanced calcium dosage creates the optimum conditions for growth of corals and coralline algae. Calcium, alkalinity and pH work together in the water to reach calcium saturation, which is essential for growth of corals and coralline algae. 

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The basis of the Balling method is the addition of calcium chloride dihydrate (CaCl2-2H2O) and sodium carbonate/sodium bicarbonate (Na2CO3 / NaHCO3). Sodium Chloride (NaCl) is formed as a byproduct of the use of these salts by the corals. To balance this additional sodium chloride, the Balling method adds sodium chloride free sea salt as a third component. Combined with the sodium chloride produced from the use of the first two compounds, this third part creates totally complete sea salt. In this way, the ionic balance of the solution is maintained.

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The three salts are dissolved in three separate containers in reverse osmosis water and can be added by means of a dosing pump in a well circulated area or at three different locations in the aquarium, this helps to avoid precipitation. The salinity in the tank will be slightly increased by the addition of these salts. This increase will be easily adjusted when doing water changes or adding make up water.