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Magnesium Supplements

Magnesium is crucial to any saltwater tank that contains hard or soft corals. It plays a vital role in maintaining calcium concentrations. If the magnesium levels drop too low, it will be almost impossible to raise either the calcium levels or the alkalinity levels. Magnesium should be added in small amounts on a daily basis until the levels reach between 1200 and 1300 ppm to match the concentration found in seawater. Some magnesium supplements also contain iron and other elements.

Grid List
  • Reef Foundations C - MG (500 ml) Liquid - Red Sea
    Reef Foundations C - MG (500 ml) Liquid - Red Sea $14.99 $12.74
  • Reef Foundation C Dry (Mg) 1 KG Powder - Red Sea
    Reef Foundation C Dry (Mg) 1 KG Powder - Red Sea $19.99 $16.99
  • B-Ionic Magnesium (1 Gallon) - ESV
    B-Ionic Magnesium (1 Gallon) - ESV $29.99 $25.49
  • B-Ionic Magnesium (32 oz) - ESV
    B-Ionic Magnesium (32 oz) - ESV $15.99 $13.59
  • Magnesium Dry Supplement (750 gm) - Aquaforest
    Magnesium Dry Supplement (750 gm) - Aquaforest $10.99 $9.34
  • Reef Advantage Magnesium (1.2 kg) - Seachem
    Reef Advantage Magnesium (1.2 kg) - Seachem $17.99 $15.29
  • Reef Basis Magnesium Liquid (500 ml) - Continuum Aquatics
    Reef Basis Magnesium Liquid (500 ml) - Continuum Aquatics $14.29 $12.15
  • CoralUp (8 oz) -   Caribsea
    CoralUp (8 oz) - Caribsea $10.99 $9.34
  • Fritz RPM Liquid Magnesium Elements (1 Gallon) - Fritz
    Fritz RPM Liquid Magnesium Elements (1 Gallon) - Fritz $29.99
  • CoralUp (16 oz) -   Caribsea
    CoralUp (16 oz) - Caribsea $20.99 $17.84
  • ME Magnesium (MG) Liquid - (1 Gallon) Concentrate Pharmaceutical Grade - MECoral
    ME Magnesium (MG) Liquid - (1 Gallon) Concentrate Pharmaceutical Grade - MECoral $29.99 $25.49
  • Reef Foundation C (Mg) - (5 Liter / 1.32 Gal) - Red Sea
    Reef Foundation C (Mg) - (5 Liter / 1.32 Gal) - Red Sea $89.99 $76.49
  • Reef Advantage Magnesium (600 gm) - Seachem
    Reef Advantage Magnesium (600 gm) - Seachem $13.99 $11.89
  • Fritz RPM Liquid Magnesium Elements (16 oz) - Fritz
    Fritz RPM Liquid Magnesium Elements (16 oz) - Fritz $16.99
  • ME Magnesium (MG) Liquid - Quart (32 oz) Pharmaceutical Grade - MECoral
    ME Magnesium (MG) Liquid - Quart (32 oz) Pharmaceutical Grade - MECoral $14.99 $12.74
  • Reef Foundations C - MG (1000 ml) Liquid - Red Sea
    Reef Foundations C - MG (1000 ml) Liquid - Red Sea $21.99 $18.69
  • Fritz RPM Liquid Magnesium Elements (32 oz) - Fritz
    Fritz RPM Liquid Magnesium Elements (32 oz) - Fritz $22.99
  • ME Magnesium (MG) Powder - (Makes 1 Gallon) - Pharmaceutical Grade - MECoral
    ME Magnesium (MG) Powder - (Makes 1 Gallon) - Pharmaceutical Grade - MECoral $24.99 $21.24
  • ME Magnesium (MG) Powder - (Makes 1/2 Gallon) - Pharmaceutical Grade - MECoral
    ME Magnesium (MG) Powder - (Makes 1/2 Gallon) - Pharmaceutical Grade - MECoral $14.99 $11.47