Tropic Marin ATM29402 Bio Magnesium Supplement 15_8-Ounce

A sufficient supply of magnesium is as essential for the growth and well being of reef building coralline algae as Magnesium. It is one of the major constituents of seawater and is directly involved in algae photosynthesis, i.e. the conversion of carbon dioxide (CO2) and light into organic compounds. The addition of plain magnesium salt, however, is not sufficient and interferes with the ionic balance of the tank water.