Description
Combined calcium chloride and sodium bicarbonate dosing
General procedure
This method supplies calcium and carbonate hardness by adding hw® Calcium Chloride Dihydrate (CaCl₂ · 2H₂O) and hw® Sodium Bicarbonate (NaHCO₃). Sodium and chloride remain as additional sodium chloride (NaCl), which can gradually alter the seawater composition.
The sodium-chloride-free salt mix hw® MineralMarin supplies the other marine salt components. Salinity also rises gradually with this method. Monitor it regularly, taking temperature into account when using a hydrometer, and compensate for the increase during water changes.



