Eheim Externals - Noise

[tenohfive]

About a week ago I rehomed a Juwel Rio 180 setup, which came with (amongst other things) two Eheim Pro external filters - no idea what exact model, and a Fluval 4+ internal. I've been running all three - the Fluval isn't cycled yet but the two externals were running before I picked the tank up so should be fine.

I've just come home from a night shift and both are making a noise. I've tried turning off and on again a couple of times, but both keep making the same noise. They are both pumping out - looks a bit less than normal but I may be being paranoid.

These are the first externals I've owned - what should I do?

 

[tenohfive]

**Edit:

Strangely enough they've settled down now. Not an emergency from what I can tell any more, but any idea on what to try to work out whats going on with them?

 

[Kizz]

I've got an eheim 2226 and mine does this occasionally if it's been off just give it a wee shake and the noise normally disappears

When i first got mine i could hear it all the time but now i hardly hear it all it's either got quiet or i've grown used to it!

 

[flash22]

its trapped air when also servicing the filter it worth taking the impeller out and give it a clean as a bit of gunk on it can make the impeller go off balance an vibrate i clean mine every other service