Can you take a picture of how you've got it set up? Sorry, just having a hard time picturing how this could happen. If it was a blockage downstream of the beckett you'd think you'd have found it by now. Weird. Anyhow I think it must be a blockage of some kind .. or yeah, maybe the injector is in backwards ... Dunno, sorry. I have a PM beckett too but I've never had THIS happen .. usually a small piece of gunk or snail shell gets lodged in my beckett and I notice it because the water level is super low in the skimmer, but not shooting out the air intake
