You may get more bang for your buck by stocking golden shiners. But if you realize that stocking FHM will just be a quick snack adding some short term forage to your pond and money isn't a factor, stock the FHM. With the established bass you have in the pond I'd say 2000 FHM would last 2-4 weeks at best. Particularly if you have steeply sloped banked with few shallow(less than 6") areas. Depending on your goals though, the golden shiners may be a better way to spend the money...