Brightwell Magnesion P ~ Magnesium Supplement for All Marine Fish & Reef Aquaria

** High-purity, anhydrous 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 such as corals, clams, and their allies to form
     skeletal material.
** Contains about 300% the magnesium of almost all other products on the market because it is anhydrous (without
     water).
** Contains no unwanted organic material such as EDTA, gluconate, or polygluconate
** Formulated by a marine scientist.