The EHEIM Professionel 3 Canister Filter is a high-performance external filtration system designed for medium to large aquariums. It features strong, efficient water flow, a large filter volume for multiple media stages, and smooth, quiet operation. With easy-access maintenance and durable construction, this filter provides reliable mechanical, biological, and chemical filtration to maintain clean, stable, and healthy aquarium water. Ideal for aquarists who need powerful, long-term filtration with minimal upkeep.