Optimal energy efficiency and quiet operation: like its predecessors, the Eheim Professional 4 250 external filter is a true technical achievement. The new feature is the "Xtender" function: when the filter media becomes clogged and the water flow decreases, a button allows you to adjust the setting if necessary.

This innovative technology makes it possible to delay the cleaning interval of the filter media by a few days when they are clogged, without even damaging the biological filtration.

Features of the Eheim Professional 4 250 external filter

-External filter for aquariums from 120 to 250 liters.
-Features the new "Xtender" function: allows you to delay the cleaning interval of the filter media for a short period if necessary.
-Square base shape: large filtration volume and high stability
-High flow rate and low energy consumption
-Adjustable flow rate
-Quiet and durable operation thanks to the ceramic turbine shaft
-Automatic priming for quick filling of the filter cartridge
-Safety adapter: can only be connected to closed valves
-Large pre-filter that effectively traps large dirt particles and allows for longer maintenance intervals. It is also easy to remove and clean.
-Individually fillable filter baskets with "Easy Clean" cleaning grid
-Ready to use.

-Maximum aquarium size: 250 L
-Pump flow rate: 950 L/h
-Heading head: 1.50 m
-Filter volume: 3.5 L
-Capacity: 6.1 L
-Power consumption: 12 W
-Dimensions: 238 mm x 244 mm x 358 mm
-Suction hose: 16/22 mm
-Discharge hose: 16/22 mm