A critical part of the pond management of an existing pond is "what's in it?" Until you have a good handle on that, everything else, like throwing in fathead minnows or culling fish, is just pure guesswork and likely to do as much harm as good.
Most people can not determine the accurate, honest status of their bass just from observation. Objective measurements are required. Equally important are measurements of the forage base. You need to measure relative weights...and not just on the bass but also on the primary forage if its bluegills. Once you have a baseline on "what's in the pond" the management steps are pretty straight forward.
I recommend you spend some time and thoroughly read this article: https://www.aces.edu/blog/topics/fi...easy-to-measure-index-of-fish-condition/
... In it you will find. not only how to measure relative weights of bass and also forage fish (important) but what the resulting numbers imply to pond management measures. It is very much worth your while to spend the time first understanding that article and then establishing the baseline of what's in the pond.
One last thought...LMB in a small pond can (will) get highly educated due to fishing pressure. To find out the true bass distribution, you may need to fish the pond on occasion with live bluegills...or whatever is your primary forage fish. You may very well be shocked at what you find!!