Brightwell Magnesion 20L

Concentrated Magnesium Supplement for All Marine Fish & Reef AquariaOverviewHighly-concentrated ionic magnesium solution.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.Stronger than most competing products.Contains no unwanted organic material such as EDTA, gluconate, or polygluconate.Formulated by a marine scientist.