You don't want any sort of BG/HBG. Those things are a curse in a swimming pond. They reproduce like mad and
ruthlessly molest swimmers with their incessant nipping. I have some accidental BG in my pond. I keep a trap soaking
24x7 from March til November to control their numbers.
My pond sounds very similar to yours. 1/3 acre, stocked forage with FHM, GSH, GAM, and northern crayfish.
RES, YP, SMB, and HSB are in there for fun and for lunch. And there are those infernal BG.
Stocking numbers in mine are basically flipped compared to yours with respect to the YP and RES. I installed 50 RES,
then another 30, and ~270 YP, 200 being fingerlings and the other 70 8"-12" sized. Sounds a little high on its face,
but I lost at least half of the fingerlings due to a 14 hour deluge of rainfall the day they were put in so I followed up
with a second stocking. Seriously consider adding SMB as crowd control for the YP. 12 HSB probably won't be able
to keep their numbers properly in check.
I'm probably a bit overstocked, but the pond is in my front yard and I keep a close eye on what's happening. I'm running
diffused aeration from April til November. Hand feeding Optimal. I've not fished it much yet. Couple times with the grand
kids and some occasional sampling to satisfy my curiosity. The fish (but not the BG) get one more year of sanctuary,
then I will start with the catch/keep/eat.
The YP will catch on to pellets pretty quickly. RES, not so much. You have to work at it to teach those guys.
This thread will give you an idea of what it takes to get RES onto pellets:
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=508098&page=1