I can't seem to get all air out of my pump basket area ... is there a trick to bleeding it out or is there supposed to be a little air in there? I can go grab a quick video to show what I'm talking about, but basically, below the clear viewing window (above the basket) in the pump chamber there is air. Normally the entire basket is submerged, but it surges/cavitates a little once in awhile and I can see the water level drop slightly below the basket's edge. I suspect a slight leak in the skimmer tubing as it's sometimes wet when the pump is off, leading me to believe that it's pulling air when the pump is running.