I am having trouble getting the water levels correct in my overflow box and my sump. If I move the overflow box up the water level in the sump drops too low and the pump takes on air. If I have it down the sump takes on alot of water and some of the bio balls are submerged also the water level in the overflow box becomes lower than the waterlevel in the tank causing a water fall effect and it is becoming noisy. The pump is also noisy is there a way I can silence it? I went to this setup becuase I heard that they are much quiter than a hang on setup. Please Help!









