Hi I am now the unexpected and unprepared owner of a 100 gallon reef tank. Things seem to be going fairly well as I'm slowly educating myself. My protein skimmer is not longer working and I'm in need of help. I unplugged it the other day before I emptied the 'scum cup' after cleaning it out, reattaching and plugging it back in it would no longer make bubbles in the skimmer body. I blew in the air line and noticed a tiny bit of water was in there. I've been searching the net all day to no avail, please help. I do not know the type of skimmer I have because there are no labels on it