Okay, so I'm real new to this. Please bare with my ignorance. How should a skimmer look while functioning? I plugged mine in today to make sure it did something. It's an eshoppes 120. It bubbles well but fills the cup with water in just a few minutes. I reduced the intake and it just takes longer, but it still fills the cup with water. Is this right? It's sitting in the center section of my sump in about 8" of water. The instructions state that it should be in fro 6" to 8". I am not running it at this point in the cycle. (I'm in week one).