Top Fin EF-S Element Filter Cartridge 3 Month Supply 2.1 in X 3.7 in

Top Fin Element Filter Cartridges are the perfect refill for the Top Fin BF5 Bettaflo filter, as well as desktop aquariums that use Element filters. These filter cartridges feature activated carbon to help keep water clean and healthy. Only at PetSmart. Features: With activated carbon to help remove heavy metals, odors, pigments and organic waste 3-month supply Includes: 3 Count Intended For: Refill for Top Fin BF5 Bettaflo filter and desktop aquariums with Element filters Product Dimensions: 2.1 in L x 3.7 in W (5.3 x 9.3 cm)