Re: Eheim Po 3 2075 mine takes a long time to prime and get all the air out of the filter headspace, i have to shake the stupid thing to get it all out. if you are using the stock intake, there is a cap on top for priming, that would be a likely place to be pulling in air. also make sure your intake isnt near an airstone or diffuser. seems obvious i know but sometimes the obvious is the culprit |