So My skimmer works but not enough air or mixing to create good foam. I cleaned it Tried two different Impellers both for Eshopps. I gave up and ordered a new skimmer. It came with a missing part Eshopps PSK-100H. So I ordered A new motor. The motor plumbing design on the new skimmers are different however. I just put on the new motor and impeller. It still does not perform. Any thoughts?