The red sea skimmer says it has a 17oz collection cup, is that big or little? I would assume big, but if i am going to be gone for a few days, i would not want it to overflow with goo. Is the red sea quiet, or does it make a lot of noise? how does it work? Never used one... do you just hang it on the back of tank and turn it on, or does it come in a million pieces that you have to finkle with to get running correctly? Bunker