Bill,
My pond is a lot smaller than yours -- it is only 50-60 ft. in diameter. Yet it consistently produces fish!
When I lived in Ohio, Texas and Wisconsin, it seemed that smaller ponds never had fish. I wish I knew what the difference was between where I live now (upstate NY) and the places I lived in the past, because the fishing is far better here than any other place I have lived.
Enclosed is a photo that I took last weekend of my son with his tenth fish of the hour.
Interestingly, my neighbor, last fall, dug an acre and a half pond and already small sunfish schools are swarming about! I am told that the birds bring the eggs on their wings.
Buck