Who Gives A Fish Forums

Had the same issue last week. Took the whole thing apart, cleaned the impeller, and it's been quiet since. Might wanna give that a shot if nothing else works.


Yep, impeller issues are often the culprit. Also, if you're using a spray bar, make sure it's not clogged. That can cause weird pressure ...

Yeah, airlocks can be a pain. I've had this happen with my Eheim. Try priming it a few times to force the air out. If that doesn't work, you might need to disassemble the filter and check the seals. Also, make sure the water level in the tank isn't too low.