Genuine Fluval carbon impregnated foam pads have been specifically designed for the Fluval FX series canister filters for reliable mechanical and chemical filtration The filter media foam structure traps small particles as water passes through, improving overall water clarity and filtration efficiency This activated carbon filtration media helps to remove odours, discolouration, heavy metals and organic contaminants for cleaner, healthier aquarium water Helping to enhance water quality in freshwater and marine aquariums, it is ideal for maintaining crystal clear water and reducing impurities Customer designed carbon foam pads that ensures proper water contact and maximum filttration performance in your Fluval FX series canister filter