I put a conventional pipe over flow in my pond, coming out of a drop inlet box and then a pipe carrying the water out of it, I got it too close to the bank and now I have a problem when it overflows it absolutely skims thousands of YOY fry out the overflow, you can stand there and watch them go, sux, I have a drain flow pipe out the bottom of the pond, 4", but in 15 surface acres of water it takes a while to lower the water level, only several inches a day, but Ive been letting it run this spring a good bit and leaving the water level about a ft below pool so that when we do have a rain event it doesn't do the fry skimming thing, also the water draining out from the deep part of the pond, 30 ft deep, has a nasty septic smell so I am convinced it is better to release it then the surface water. So I guess I guess I wish I had spent the extra dollars and did a siphon over flow system.
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