Beside Calcium, Magnesium is important for a marine Aquarium

4th most abundant component of saltwater after chlorine, sodium, and sulfate, magnesium is essential for tank balance. Its level is approximately 1300 mg / L in natural sea water.
It is used in synergy with calcium in the construction of coral skeletons and in the development of coralline algae. In tanks with a low level of magnesium, calcium is consumed more quickly. It can also bind to the phosphates and make them unavailable to algae.

ProMagnesium is a simple and economical solution for informed aquarists wishing to raise the level of magnesium in their tank. A magnesium rate of 1200/1450 mg / l is necessary to guarantee an optimal and solid construction of the coral skeletons as well as the calcareous algae. Magnesium consumption is dependent on the tank population, lighting, and the availability of all trace elements.

ProMagnesium is used, preferably dissolved in reverse osmosis, or demineralized water. Adding 10 g of ProMagnesium in 100L of water corresponds to an increase in the magnesium concentration of 9.9mg / L.

The use of ProMagnesium should be reserved for aquarists who are comfortable with monitoring and understanding the measurements of the parameters of their tank.
If you want a ready-to-use solution, we recommend the use of Calci Reef+ und Alka Reef+.