Ok got A skimmer in a diy 10 gallon sump HOOKED UP TO A 50 GALLON with a few fish like 5 and a reef lobster. its a IN SUMP hang on back model and put it in and found a comfortable level turned it on and it skimmed for about a couple of hours with nice green skimmate and next day woke up and no skimming actual skimmate just stopped producing is this normal ?the level of bubble went down waited probably about four days checked it and no action yet ! i know there is a break in period but I think ive passed that! i posted a video on you tube check it out and let me know if im doing something wrong! im gonna post another of it not working at the same level !! Youtube - Video title" REEF OCTOPUS BH-50 INT NANO SKIMMER".