Brightwell Aquatics Hydrat-Mg *

Overview Safely increases magnesium concentration in all marine and reef aquaria. Utilizes specific magnesium salts to obtain the desired results. May be used to attain and maintain a magnesium concentration in excess of 1,500 ppm as desired by aquarist. Maintaining an elevated magnesium concentration, relative to the average natural seawater concentration, for a prolonged period of time may be of benefit to reef aquaria in certain situations, and should be attempted by experienced aquarists only. 75,000 ppm magnesium Sizes 125ml | 250ml | 500ml | 2L | 20L