this is a canister filter btw
The filter began vibrating badly so I bought a new impeller. It is quieter now but not nearly as quiet as when it was new. It also cavitates(gurgles, pushes air out), so air must be getting in somehow. I guess it could be the o-ring around the main unit's lid, or any joint along the inlet side that's out of the water.
The impeller was $19! so I'm considering just getting a new/different filter if I'm going to have to replace stuff.
any input?
Thanks

