I have the same problem as you and it have been running for a week now. Talked with someone at Skimz. And they says that is normal during the cycle period .
But here's a video that I uploaded to YouTube
http://m.youtube.com/watch?v=5_Dtxi5rERs
But what about the noise level of the skimmer ?
Does any if you have the same buzzing sound ?
It's kind of to much actually ?