DoItYourself Magnesium Supplements for the Reef Aquarium ...
To perfect such a recipe, it''s imperative to know the amounts of sulfate in Epsom salts (39%), the amount of chloride in magnesium chloride hexydrate (%), and their bulk densities, because most aquarists will use a volume based measurement ( g/cm 3 for Epsom salts and g/cm 3 for magnesium chloride hexydrate solids).