We just got a G1-X Protein skimmer and a Euro-fil 125 Acrylic sump for our 60 gallon tank. Everything is hooked up and working, we just can't seem to get the water level in the tank to stay put and we have to unplug it before it overflows the tank? How do we adjust the water flow out to keep up with the water flow coming in? Any ideas? Thanks-Desiree