I manage two association pond in a new housing addition of 200 homes,and all we use is street runoff to feed a area that once was a stream and wet lands. Twenty feet deep and each the same size as yours. Four years ago with DNR advise i stocked 2 thousand four inch bass and the same amount of hybred bluegills. Plus fat head minows for the bass. We now have two and three pound bass and thousand of little gills to feed the bass and many 12 inch bluegills. No cover--A few unwanted chritmas trees. We did provide three truck loads of sand for bedding areas . BILL