Filter putting out bubbles.

MoonInTn

New member
One of my Rena Filstar XP 3 filters is putting out bubbles in the tank from time to time. It's not a constant thing, more along the lines of bursts. It's been doing this for about 1-2 weeks and I can find what's wrong. I've taken it apart, (more than once), looked over the impeller, the gasket, the O ring, hoses, etc., and I still can't figure out what might be causing this. Anyone got a suggestion as to what might be causing this?
 
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