OK, I found the instructions, but maybe I'm not doing something right. I set it up for sump use, and I have it sitting in water that is about up to the halfway point on the body of the skimmer. However, when I turn it on, the water in the exit pipe doesn't exit, I can see it a few inches below the top. If I raise or lower the skimmer, it raises or lowers the level of water inside the skimmer. Shouldn't I be able to stick the skimmer in shallow water with the sump kit?