bassman, if money is not a concern, then certainly adding minnows each year will have some benefits to the existing predator fish.
Ideally, it would be great to have an established population of some kind of minnow that sustains it's presence. Some species of 'minnows' may do that, others not so much. Conventional wisdom says fathead minnows will mostly all get eaten when put into a BOW with numerous predator fish. I don't think that every single fathead gets eaten, but still, the population may not thrive.
Now, I've see Golden Shiners exist and thrive in a pond with numerous predator fish....to the point where I think there may be too many golden shiners in the pond. There's pros and cons to that.
