My pond in the middle is about4 feet deep. I want to make an island for my geese to nest on. Any ideas on a way to construct a permanent island that will provide fish habitat as well as a good nesting spot? Or would a larger floating island be easier to construct? My thought was to stack cinder blocks and put pallets on top of them at water level. Then put dirt on top of the pallets and plant grass and other marsh type plants on it. This would give fish great habitat and provide island habitat. Any thoughts????