???I seek your guidance, I have a 55gal - and the overflow box is approx 1/2" above water w/ 1" supply to 15gal sump. Water level in sump is 4 1/2" deep, being pumped out by a RIO 3100. my return line is also 1" dumping back into the tank creating a whole mess of BUBBLES!! like one giant air stone clouding the tank . Should I raise the overflow box and increase the water depth in the sump by adding a gallon or two?