Replenishes the magnesium concentration with a seawater ratio of magnesium chloride and magnesium sulfate. Magnesium is a major pH-stabilizing component of the seawater buffering system. Magnesium is also important for the operation of various cellular enzymes, and the functioning of photosynthesis in plants, including the symbiotic algae in corals and anemones. 500 ml (16.8 fl oz) bottle.
