I think the balance of a pond is affected by a couple of things.
First is the fertiltiy of the pond. That makes a huge diference in the number of fish the pond can support.
Second is the balance of fish in the pond.
I try to get the folks who own the pnd to put slot limitis on bass, from 12 to 16". The larger bass live on small fish and the smaller bass will do a job on the panfish minnows.
The latest info I have read is for 10 lbs of panfish for every pound of top line predator taken out. That would be bass and catfish in most ponds.

I rarely keep a bass and have been turn back all the gills over 10 inches as they seems to keep the small gills from spawning. I keep all the crappie that I catch.

Hope this helps.

Rick