Nathon Payne - Have you considered putting some hardware structure mid-lake for fish attractors. Throughout the year as water levels change the little fish will migrate towards the structure and the bigger fish will eat them. In my 1.5 acre pond it seems to help balance the population variety of fish sizes.
One other comment since I couldn't tell from the surrounding tree cover. Make sure there are enough cross lake breezes available to the pond for aeration if none provided otherwise fish will stress even if feed - probably more. Too thick a tree stand can cut off your air movement.
Nice pond.
