We are going to be building a new pond a hundred yards above our 1.5 acre pond, it will be prob 1/2 to 3/4 of an acre. I want to be able to lower the level during the summer to plant millet for waterfowl. Would you all recommend a Siphon system or something else ? Pond will hopefully be 12 ft at the dam . My builder was just planning on putting in an overflow pipe and a natural spillway but I like the idea of being able to drain some of the pond. Our 1.5 acre pond leaks pretty bad so being able to drain some water into in when it gets low seems to be a plus . Any help would be greatly appreciated