Carbon cartridge for filter Fits the AF-100 and AF-200 Aqua Della filter Keeps the water clear and clean Description: A spare carbon filter cartridge for the Aqua Della AF-100 & AF-200. Also fits the older models AFI-80 & AFI-150. Filtering with a carbon cartridge ensures good water quality An aquarium filter is essential to maintain the quality of the water in your aquarium.