Seachem de*nitrate is an economical, natural, porous material designed for effective nitrate removal in both freshwater and marine aquariums. Its unique pore distribution supports aerobic nitrification in the outer layers and anaerobic denitrification at its core. This dual action allows it to efficiently remove nitrates, nitrites, ammonia, and organics, creating a healthier environment for your aquatic life. This 500ml/17oz bottle of Seachem de*nitrate is a powerful tool for maintaining optimal water quality. The high porosity of the media supports the proliferation of beneficial bacteria, further enhancing its ability to remove toxic aquarium byproducts. De*nitrate can be used in a variety of filter setups. * Removes nitrates, nitrites, ammonia, and organics * Suitable for both freshwater and marine aquariums * Promotes aerobic nitrification and anaerobic denitrification * Economical and natural porous material * 500ml / 17oz bottle