Discover the ‘classic’ external power filter range—high quality, reliable and highly efficient for fresh and marine water aquariums. The proven one-chamber design offers maximum flexibility for mechanical, biological, chemical and adsorptive (carbon) filtration, delivering crystal-clear, healthy water with quiet, continuous, trouble-free operation.

• High operating pump output reliability to protect against overheating.
• O-ring fixed on the pump head for convenient handling and secure sealing.
• Optimised materials for years of durable, low-noise performance.
• Efficient flow and circulation with strong delivery head for robust filtration.
• Generous filter volume to support superior biological capacity.
• Low power consumption for energy-efficient running.
• Compact cylindrical form for easy placement and maintenance.

The “+” models come complete and ready to run with filter media, hoses, taps and fittings. Depending on model, included media may feature Ehfimech and Ehfisubstrate or various grades of filter foams—ideal for layered mechanical and biological filtration from coarse to fine, and perfect for pairing with carbon as needed.

Whether you’re setting up a new aquarium or upgrading your system, this classic external canister filter range provides dependable pump output, stable circulation, and ample filter volume to support thriving aquatic life. Designed for both freshwater and saltwater use, it’s a trusted choice for hobbyists who value long-term reliability, easy handling, and clean, clear water.

Technical specifications EHEIM classic 250 
- for aquariums up to 250 l
- Pump output: 440 l/h
- Delivery head: 1.5 m/Ws
- Canister volume: 3.5 l
- Filter volume: 3.0 l
- Power consumption: 230 V/50 Hz 8 W
- Dimensions: 160x355 mm (diameter x height)
- Hose size suction side and pressure side 12/16 mm

Technical specifications EHEIM classic 350 
- for aquariums up to 350 l
- Pump output: 620 l/h
- Delivery head: 1.8 m/Ws
- Canister volume: 4.8 l
- Filter volume: 4.0 l
- Power consumption: 230 V/50 Hz 15 W
- Dimensions: 185x370 mm (diameter x height)
- Hose size suction side and pressure side 12/16 mm

Technical specifications EHEIM classic 600 
- for aquariums up to 600 l
- Pump output: 1000 l/h
- Delivery head: 2.3 m/Ws
- Canister volume: 6.6 l
- Filter volume: 6.0 l
- Power consumption: 230 V/50 Hz 20 W
- Dimensions: 205x400 mm (diameter x height)
- Hose size suction side 16/22 mm and pressure side 12/16 mm