Our 3/4 Acre pond is fed from a hill run off and is drained from a steel pipe that runs into a creek. Would it be ok to raise the pipe like a foot or so to increase the depth of the pond and increase the overall size, or would this cause unforseen problems? Also there is no known structure in the middle of the pond, just a few small patches of aquatic grass near the edges. Would a pond this small benifit from a man made reef? Thanks for the advice.