BR
I think adding FHM to your pond, already stocked with predator fish, is not a wise investment nor the best way to reach your goal of providing forage. They will be extirpated within a matter of weeks if not sooner in a BOW that size.
You'd be far better selecting a forage fish that possesses excapability response and stands a chance of reproducing. Why not just get BG, Tilapia and Shiners going? Much better investment and you'll achieve your goals of providing an sustainable forage source.