Just bought another maxi jet 1200 powerhead yesterday. Each powerhead produces about 1200 or 1300 gph. Forgot the exact. Anyways, I placed both powerheads on the opposite side of my 55 gallon facing upward. The one on the far right is towards the back facing up and the powerhead on the far left is towards the front facing up. My sand is constantly being flown around with the current. Could anyone help me with the proper placement to avoid sand flying everywhere?