The Eheim Classic Canister Filters with Media, design allows for the greatest flexibility in media set up for biological, mechanical, chemical and absorptive filtration. The flow rate has been calculated to provide the exact balance needed between mechanical/biological long-term filtration and water circulation and oxygen enrichment, resulting in optimum conditions for successful aquarium keeping.
The 2211 has a pump output of 60 gallons per hour and is equipped with filter sponges and/or loose filter media.This filter is suitable for aquarium sizes up to 40 gallons.
The 2213 has a pump output of 116 GPH and is suitable for tanks up to 65 gallons.
The 2215 is suitable for aquariums up to 95 gallons and has a pump output of 164 GPH.
The 2217 is suitable for aquariums up to 160 gallons and has a pump output of 264 GPH.
They come complete with media (Ehfisubstrat, Ehfimech, fine and coarse filter pads) and quick disconnect valves.
The manufacturer recommends 2213, 2215, 2217 for both freshwater and saltwater aquariums.