I just got a new protein skimmer and the pump. I don't know how the cup at the top is working. Is the water suppost to flow into the cup. Right now I have a bunch of bubbles at the top and they slowley go into the collection cup. And does this hurt the pump because I don't thing that I have the pump pushing full blast because I turned the red valve at the bottom down a little. And there is a metal screw on the valve that is under water is the whole thing sumergable. I need help