Sound coming out from Eheim 2028

[wasabi8888]

Hi all

I have the above (which I bought new) running in a 2 ft tank. Been running for 6 months. The inlet is covered with a sponge which acts as a mechanical filter and the outlet has a Eheim oxygen diffuser attached to it.

Recently, i hear the diffuser coughing out 'pop' sounds. What could be the cause for it? Air lock or clogged hose?

If it's an air lock, how should i solve it?

Thanks all

[benetay]

If it's air lock, tilt the filter 45 degrees to remove air. Is the inlet taking in air or there is a loose connection between the hose & the inlet which sucks in a little air thus resulting in the sound?

Have you tried cleaning the impeller area too? It's good to give it a wipe once in a while as scum builds up reducing efficiency.( Has nothing to do with the air )

If you can see air bubbles coming up from the outlet near the filter before reaching the diffuser, it could be air.

Cheers!