I got my tank filled with rodi water and let the tank overflow in the sump till the water was level with all of the baffles. I turned the pump and skimmer onn and as you will see by the pics the water is over the baffle at the skimmer about 1/2 to 1 inch. There are a lot of bubbles to. If i pinch down the pump flow the return gets quiet and there is no bubbles but the water is still over the baffle by a inch. Also if I take water out of the sump to lower it the return almost runs dry. Im running an eheim1262pump on an aga 120 with dual overflow. 1 inch drain and 3/4 return. The baffles are 11 inches tall and the sump is a 40 gallon breeder. Here are some pictures.