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jpluttme · 04/13/2006, 11:32 PM

So you've got an over the back of the tank overflow rather than a traditional or drilled one? I have the same thing- had to step down to the 480gph version and use penductors to get the flow I wanted. Might want to try flexible pvc or a different overflow design. There may not be any getting around it although sometimes it does help to umplug the pump for a few seconds a couple times to try and get the air out that may be in there.

You can also try a bio ball in the pvc line to break the little vortex that is causing the cavitation.

04/13/2006, 11:32 PM	#2
jpluttme Registered Member Join Date: Apr 2002 Location: Wilmington, NC Posts: 288	So you've got an over the back of the tank overflow rather than a traditional or drilled one? I have the same thing- had to step down to the 480gph version and use penductors to get the flow I wanted. Might want to try flexible pvc or a different overflow design. There may not be any getting around it although sometimes it does help to umplug the pump for a few seconds a couple times to try and get the air out that may be in there. You can also try a bio ball in the pvc line to break the little vortex that is causing the cavitation.