Eric, the minnows wouldn't last long. I'm no expert by any means but in that size pond with the exsisting bluegill population you may be a little overstocked. Your bluegills should spawn 3 to 4 times a year starting at 3 to 4 inches in length. I have had at least 2 spawns since my original stocking on Jan 31 of this year. Another forage species may be in order but I couldn't recommend on that. Hopefully someone with more experience with the other forage species will respond. Good luck.
Bill

Bill