Marinium Black Crystal is a high quality activated carbon that will remove organic pollutants, toxic gases and heavy metals in saltwater and freshwater aquariums. It is produced from bituminous coal and has a microscopic pore size ranging from 20 to 2000 Angstrom, which allows it to absorb both large and small organic molecules. Marinium Black Crystal is designed for long term use by being activated to an iodine number of more than 1050 mg/g and a surface area of 1100 m2/g.

Contains less than 0.2 % of ash and does not leach phosphate and nitrate, it is suitable for delicate systems such as reef aquariums containing corals and planted fresh- water aquariums with sensitive fish and plants.

Pre-washed and conveniently packed in a filter bag that is ready for instant use, without the trouble of filling and extensive washing.