It sounds like you are not a good cantidate for aeration. With a steady downhill slope to the pond it would be possible. You are going to have condensation forming in the dip in the line which will cause alot of back pressure. Does anyone have a situation where they have a windmill pumping well water into a pond to keep it open? Our wells keep a sizable hole open with just a trickle of water coming in even up nort here eh! Koenders has a water pump available if I am correct.