Ok Im still having problems with the adjustment. either way i turn it, it still seems to not make a different on the flow. Also is the middle section between the main tube and skimmate cup suppose to have water in it? It is about half full of water whenever i turn it on. also the skimmer is about 5-6" in the water. any tips on this octupos nwb 110 will be helpful. Its not a cone model either straight tube.