I have the tubes set up like a normal XP would have it. but then it was really bad, it was almost 2 minutes of working. I switched out the intake tube with some regular clear flexible tubing, added a sponge at the end. Still have the U-bend tube on there with the fill cap. It seemed to help but still loses suction.
I noticed as soon as I fill up the intake tube and start it, it drops to about half of what was in there. Before it dropped all the way, then i dialed the flow control all the way down on the output end. that helped but still goes to about half was not and then eventually falls. I currently have nothing in the filter, I did have the box with pads and everything but I just got a trickle from that.