Ok so when I bought my tank it had the Red Sea skimmer in the sump and the guy said it goes with the tank but he never used it. Something about fish only tank. But anyway when he was helping me set it up he said all I needed to do was plug the pump in and hook up an air pump to it, so I did. Now Im thinking that it doesn't need an air hose and that it actually sucks air threw that hose when the pump is running. Im guessing that may be a huge cuase in my skimmer not doing much?