newbie here. I just cant get my skimmer tuned in, its been set up in my sump for around a month now. as I understand the bubbles should be right bellow the top of the collection cup. it will work fine for a random amount of time and then ill come back either in the morning or a few hours later, even during the day, and the cup is completely full and its shooting water everywhere. I have the skimmer on a 2 inch base so the water level its at is 7.5 as recommended by the company. I should mention my tank unfortunately got some kind of disease in it and killed all my fish (didn't QT, lesson learned) could this be the cause? just wondering because now that all my fish are out of the tank (2 days) its seem to be working a little better for some reason. any imput helps !