I have three ponds in line with each other there is about twenty feet of elevation between each. The bottom pond is about an acre, middle pond is fifth of an acre top pond is tenth acre. Main pond is forty years old so I am using 3"trash pump to dredge muck and water to the upper pond,then let it settle and create an algae bloom then drain the water to the middle pond.middle pond has minnows and black crappie, hopefully I will get a crappie spawn and raise them large enough so that they won't be eaten when I move to the larger pond.