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ECO Magnesium Liquid

Description: Adds essential magnesium for all reef inhabitants.

Type: Marine Supplement

Main Points:

  • Adds magnesium in marine systems
  • Raises magnesium levels to 1300-1400 ppm
  • Phosphate and Nitrate Free


Magnesium is one of the major minerals found in natural seawater and all sea salt mixes. Maintaining a magnesium concentration between 1300-1400 ppm is essential in a reef aquarium, as it will ensure optimal coral growth by facilitating the maintenance of other necessary parameters at natural seawater levels.However, magnesium is rapidly depleted from the aquarium through a variety of biological processes — it is used up by the organisms in the system. When the magnesium concentration falls below 1300 ppm, problems may arise in maintaining adequate calcium levels (420-430 ppm) and carbonate alkalinity (7 dKH).ECO Magnesium is an ionically balanced product that will safely raise the magnesium concentration to the safe levels found in natural seawater (1300-1400 ppm). Nitrate and phosphate free!

Directions for use:

Test the magnesium level in the system with a reliable test kit before using ECO Magnesium.If the magnesium concentration is below 1300 ppm, do the following: It is important to shake the bottle of ECO Magnesium liquid vigorously prior to each use! Add 1 ounce (30 ml) per 30 U.S. gallons (50 ml / 200 liters) per day of ECO Magnesium until a magnesium concentration of 1350 ppm is reached. To maintain this level, add 2 teaspoons (2 capfuls or 10 ml) per 50 gallons of tank capacity every week.Caution:For aquarium use only. Keep out of reach of children. Not for human consumption.


Deionized water containing the following elements (as ions): magnesium, chlorine, sulfur, calcium, potassium, bromine, strontium, boron, fluorine

Sizes Available:

8oz, 16oz, 128oz

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