I recently upgraded to a new 20gal system and I’m having a heck of time with the pump and getting it to prime. I’m using the Chugger SS-C which has the liquid in in the center then the liquid out on the top. There seems to be a lot of air bubbles which are causing it to run dry and it just screams until I try to work them all out. Any thoughts on how to prime this more effectively? Attached is a photo of my system before I raised the HLT about 2 feet above the pump. Should I shorten my tubing? Is there a vent I can make?