I'm having a little trouble dialing in my new skimmer. So I've got the mag pump in the 1st chamber of my sump, where the overflow PVC plumbing comes in and the skimmer in the 2nd chamber, and my return in the 3rd chamber. When I turn on the skimmer, the mag drive pump sucks up all the water in the 1st chamber before the return can replenish the water around it to keep it from running dry. Do you think I should try raising the water level line in my sump? Should I throttle back the mag drive? Any advice would be greatly appreciatedthanks