Supa Activated Filter Carbon 3 Litre is a very effective chemical media for use within both aquarium & pond filters. Activated Carbon removes impurities and odours to leave your aquarium or pond with crystal clear water. Activated Carbon works by removing heavy metals, odours, discolorations, organic contaminants and pollutants from the water. Supplied in resealable bucket which ensures the product does not get contaminated. Suitable for freshwater & marine aquariums and also ponds filtration systems