Planted Tank Guru
Join Date: Jul 2010
Location: Huntington Beach, CA, USA
Not a big problem usually. Since there is only one moving part, the impeller, that is the place for noise. One way to make noise is if there is air around the impeller. this will also keep it from pumping much water so we might jump to the conclusion that air is the cause.
I would suggest as a first step, tilting the canister somewhat slowly about 15-20 degrees and around in a circle so that air will find it's way up and out the tubing to the tank. This is assuming that the tubing is full of water and not setup with dips so that water and air are trapped in the tube?? Make sure the intake tube is under water so that it will siphon more into the can. This should make lots of bubbles come out the outlet tube into the tank. Expect some dirty looking grung as well. If not a fix come back as there are other things like bad impellers to make noise.
Last edited by PlantedRich; 11-10-2013 at 09:23 PM.