What are your goals for the pond? Have you fired up one of the planimeter websites to get a better estimate of surface area?

6' is pretty shallow for a pond that freezes over. Aeration or a surface agitator will probably be needed to prevent future winter-kills if you don't dig it out.

Largemouth Bass would control shiners and frogs. Stocking Largemouth will require additionally stocking Bluegill for a balanced pond ecosystem.

Ponds in TX, lake place in WI, me in CA