If the pump is too deep, when I lift the unit up a few inches it should begin making bubbles right? When I lift up the whole skimmer, no bubbles start forming. If it is too deep, any suggestions on how to lift it up. I attached it w/the short flexible tube that came w/it and it's resting on the edge, there's not really any way to make it come out of the water more w/o lifting the whole unit up and it's hanging on the back of my tank as it is. If it was too deep, wouldn't it still be producing bubbles but less of them? I could be wrong, I just want to be clear before I build some sort of complicated contraption to lift the whole skimmer up and not have it make a difference. As it is, the top of the pump is hanging about 2.5-3 inches above the water.
And does anyone else think it's weird that when I adjust the nozzle connected to the pump to allow the water to rise it starts making bubbles, but as soon as I turn it down (so the water doesn't flow into the collection cup) the bubbles stop?