My Eshopps PSK-75H nano protein skimmer is sucking up too much water. In the instructions, it says the water should be maintained at the bottom of the neck. It worked fine for awhile, but after a recent water change, the water just keeps going and going, getting sucked up into the collection cup and flowing out of the air intake tubing, back into the tank and onto the floor. Any idea of why this is happening? I think it happend before during my first water change, but it went back to normal and I can't remember what I did or didn't do for it to get back to normal.Thanks.

I know my skimmer goes nut when I do a water change. Just leave it off for a few hours after you do your water change. Then moniter it for a little bit when you turn it back on.