Have a 120 and just got a used euroreef in sump skimmer. Testing it out to see if it will work properly. All seems in order, pumps works, foam rises, etc.. My issue is the fact that I have adjusted the skimmer to as low a place as possible, yet I continue to collect water in the collection cup at a fast rate, i.e. a couple of inches per hour. The skimmer is sitting in 9-10 inches of water. Is there something I can do to slow the rate of water in the cup down?