I have just set up my waterbox 100.3 and the overflow is really loud. I know this is a common problem, but I can't seem to tune the valve and pump to silent. I am running a pretty large pump for my setup, (simplicity 2100 on about 100 gallons of water), but i have it turned all the way down. When I took 4 cups of water out of the top display, the gurgle stopped for a minute, before starting again as the water level rose again. Does this mean I'm running too much water through my overflow box and that's why it's loud. If i cut my weir teeth lower would that solve it as the display's water level is dropped? Or do I just need to try harder with tuning my valve.