SR Aquaristik Magnesium Supplement - 1kg - Magnesium Chloride Hexahydrate

Sale price$19.99


  • Ideal for Saltwater Reef Aquariums
  • Dissolves completely and easily in purified water
  • Lab tested and pharmaceutical grade
  • Phosphate and Ammonia free


Recommended Dosage: 1000 ml or 880 grams makes 1 gallon of high quality supplement

Instructions for use:  Add 1000 ml of the Magnesium Chloride Hexahydrate into a clean dry 1 gallon container. Fill the container about ¾ full with RO/DI or filtered water; shake vigorously for about 2 minutes. Fill the remaining portion of the container and let sit overnight before adding to the aquarium. For best results, drip the supplement slowly into the sump of the aquarium.

  • Can be mixed in a 1-1 Ratio (500ml of each) with Magnesium Sulfate for use as a popular 2-part solution and a stand-alone magnesium supplement.

Recommended magnesium levels are between 1,250 and 1,350 ppm. When not testing, add (10 ml) per 250 gallons weekly.

You will need the following (Not included):

  • 1 new clean food grade container with sealable lid
  • 1 gallon of RO/DI or filtered water.  If you are buying the water, you can also use the jug as your mixing container.
  • Clean plastic funnel

 Click here for Material Safety Data Sheet (MSDS)

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