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Ecological laboratories Magnesium Supplement is a bio-available natural component that is an essential element for hard and soft corals which is normally depleted by filtration and coral absorption. Magnesium Supplement is balanced for reef and marine aquaria.
The Magnesium Supplement will raise the level of magnesium safely in a marine aquarium and will not upset the ionic balance. This formula is nitrate, phosphate and gluconate free.
***Be sure to shake well before every use.