EHEIM Professional 350 External Filter (2273)

The Xtender function allows you to manage blocked filter media. By adjusting it, you can maintain adequate water flow and filtration performance for a longer period between full cleaning cycles, helping to preserve beneficial bacteria.

The frequency depends on your aquarium's stocking level and bioload. The top pre-filter should be checked weekly. Mechanical media (sponges) may need rinsing every 2-4 weeks. Biological media should only be rinsed gently in used aquarium water when flow is significantly reduced, typically every few months, to avoid disrupting beneficial bacteria.

Yes, the EHEIM Professional 350 is suitable for both freshwater and marine (saltwater) aquariums.

The filter measures approximately 238mm wide, 398mm high, and 244mm deep.

Yes, the filter is typically supplied with original EHEIM filter media and installation accessories.

Ensure the filter canister is filled with water. The integrated self-priming aid should help restart the filter automatically once power is restored, or you may need to use the priming button.

Ensure the filter canister is sufficiently filled with water using the priming aid. Check that the power cord is securely plugged in and the outlet is functional. Verify that all hose connections are secure.

Clean the top pre-filter sponge. Rinse or replace mechanical filter media. Check for any blockages in the intake or output pipes and hoses.

Ensure the filter canister is stable and not vibrating against any surfaces. Check if the impeller or ceramic axle is obstructed or damaged. Refer to the manual for specific impeller cleaning instructions.

Check that the canister lid is properly sealed and the O-ring is clean and correctly positioned. Ensure all hose connections are tight and the safety adapter is correctly installed.