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Bulk Reef Supply

BRS Bulk Magnesium Chloride Aquarium Supplement


Maintaining proper magnesium levels helps achieve the essential balance of calcium and alkalinity in your tank by preventing excess calcium carbonate precipitation. BRS Bulk Magnesium Chloride is crystalline hexahydrate and dissolves crystal clear. These small crystals are easier to measure than larger flakes used by other supplements.

Bulk Reef Supply constantly strives to provide the best additives possible at the best price. BRS Bulk Magnesium Chloride is produced using only the best pharmaceutical grade material available and meets strict BRS purity standards. For best results, mix with BRS Bulk Magnesium Sulfate as part of the popular 2 Part Calcium and Alkalinity solution as well as a standalone magnesium supplement. NOTE: You can tell a lot about the purity of magnesium supplements when magnesium sulfate and magnesium chloride are mixed together. High quality/purity magnesium supplements will mix together crystal clear. When mixing lower purity supplements you will usually see white precipitation and sediment form especially when mixed together.

Bromide, Ammonia and Phosphate Free

See Mixing Instructions in Full Details

  1. Test current magnesium level
  2. Use our Reef Calculator
  3. Input required information to get dose
  4. Follow calculator’s guidelines when adding to tank
  • 1 Standard 8 oz. dry measuring cup
  • 1 Empty 1 gallon jug
  • 1 Funnel
  • 1 RO/DI or distilled water
  • 1 Magnesium Sulfate

Add 5 level cups of Magnesium Chloride and 3 level cups of Magnesium Sulfate to a one gallon jug and mix with RO/DI or distilled water. Let sit before use.