My remora pro skimmer has been running for about 8 months, and has skimming absolutely nothing. It has a maxi jet return and is located in the center of the tank, with the tubing taking the maxi jet about half way down the tank. For a little while it skimmed some very light skimmate, but completely stopped. It would bubble somtimes and not does absolutely nothing but run with the water coming through the return. It used to make a sucking noise, but seems to have stopped. Ive heard good things about this skimmer so im thinking maybe its the specific model. Attached are some pics... any ideas?