The filter impeller is turning but water is not coming out of the Bluwave 05 - what should I do?

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Accepted Answer

If the impeller of the Bluwave 05 is turning normally but no water is coming out, here are the most common causes and their solutions:

1. Air pocket in the pump body (most common cause)

Trapped air prevents the pump from creating a prime. The impeller is turning "dry" without sucking in water.

Solution: Unplug the filter for a few seconds, tilt it slightly under the aquarium water, then plug it back in. You can also gently blow into the water outlet to force the filling by suction.

2. Clogged foam and filter media

The Bluwave 05 has multi-porous mechanical foam and activated carbon foam. If they are very dirty, water can no longer enter through suction.

Solution: Open the filter compartment and gently rinse the foams with aquarium water (never with tap water to preserve beneficial bacteria). Depending on usage, the mechanical foams need rinsing every 2-3 weeks.

3. Blocked suction grids

The Bluwave 05 has surface suction grids (designed to prevent oily film accumulation). Debris, algae, or sand can block them.

Solution: Check that the suction grids are clear. Clean them gently with your finger or a soft brush.

4. Insufficient water level

If the level has dropped, the pump head may emerge and suck in air instead of water.

Solution: Ensure the filter is fully submerged and restore the normal water level.

5. Damaged impeller

Even if turning, the impeller may not create flow if its shaft is broken or the blades are cracked.

Solution: Carefully open the pump head and inspect the impeller. If it is damaged, it needs to be replaced (parts available from specialized aquarium suppliers).

Tip: In 90% of cases, the problem is an air pocket - start with this simple solution. If it persists, describe what you hear (normal motor noise, vibrations, silence...) to refine the diagnosis.

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