Brightwell Hydrat-MG Planted Aquarium Supplement - 500 ml
Overview Magnesium is necessary for calcium building marine and reef animals, and to control bryopsis algae, but is naturally depleted in your aquarium. Brightwell Hydrat-MG Hydrated Magnesium supplement keeps your aquarium’s magnesium levels at an ideal level.
This 75000 ppm magnesium solution is for experienced aquarists only. It maintains an elevated magnesium concentration, in excess of 1500 ppm, relative to the average natural seawater concentration, for a prolonged period of time to benefit your reef aquarium.