Aquarium canister filters are generally located outside the aquarium, and are connected to the aquarium using hoses and tubes. The advantages of aquarium canister filters are high, multistage filtration, output capability, flexibility of location since they are neither inside or hanging on the aquarium, and ease of maintenance with no disturbance to aquarium inhabitants. Aquarium Pumps and More has a wide selection of aquarium canister filters featuring Rena Filstar, Eheim, Tetra and Marineland.