I have a rectangular pond, 1 acre, average depth 7 feet. It is populated by CGC, crucians, bullheads, LMB, some PS and local minnows like your FHM. I supplemental feed them from march to october/november with a 42% protein fish pellet.
This year I've removed about 450 lb of biomass from the pond (crucians and some CGC), to reduce the biomass load that was actually too high for a 1 acre pond.
In the next spring I would like to introduce european perch, as forage for adults LMB and as predators of young LMB.
The fishery owner told me he would give me perch long about 8". How many can I introduce in my pond?