Brightwell Aquatics Magnesion-P

Magnesium Supplement for All Marine Fish & Reef Aquaria.


  • High-purity powdered magnesium blend.
  • Provides magnesium, which helps regulate the balance between calcium and carbonates in aquarium water, and is a component of aragonite, the mineral secreted by reef-building organisms to form skeletal material. 
  • Stronger and more economical than liquid magnesium solutions; created for hobbyists maintaining multiple reef aquaria.
  • Formulated by marine scientist.


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