What fish to stock my pond with? its about a half of an acre and is fed by a small stream.fish must be edible?

Trout probably wouldn't survive in your pond. Lake Trout need deep and cold water to survive. Crappie would be a good choice for your situation. Keep in mind that you have to have a diverse habitat for it to be successful. B, bluegill, and some sort of shad would also be ideal.