The Aquatopia internal filter for Fish Tank use in freshwater aquariums. It is energy efficient, but still powerful enough to do a solid job. This internal fish filter is easy to operate and maintain. Specially designed filter canister is easy to remove, clean and maintain. Includes filter sponge with carbon for high-efficiency filtration. For aquariums from 20L up to 100L, the adjustable flow rate from 50-200L/Hr.