High quality activated granular carbon. Immediately removes impurities from the water, coloring substances and causing water turbidity, thanks to which it significantly improves its clarity. At the same time, it removes medication residues and compounds accumulated in water. Unlike other, phosphorus acid activated media available on the market, Carbon is activated by steam, so it doesn’t contain any phosphate. The product effectively removes all harmful substances resulting from the “chemical war” between corals, therefore it is perfect for mixed-reef aquariums. It also perfectly fits the needs of ULNS aquariums, very heavily stocked with SPS corals.