Magnesium
Magnesium is necessary for the ion balance, and binds the silicic acid within the water. Many invertebrates and soft corals, sea fans, sea urchins, starfish and coralline algae need it to build their skeleton or shell.
The aimed (natural) magnesium content of salt water is approx. 1,350 (1,200 - 1,400) mg/l
Content: 0.25 Litre (€35.80* / 1 Litre)