Brightwell Aquatics Magnesion-P – Dry Magnesium Supplement, 3.2 kg.
* 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 a marine scientist.
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