thanks for the info Boburk.

Would it help keep the CNBG in check better if I stocked heavy with grass carp so they would eat more of my pondweed and coontail so CNBG can't get away from the HSB as easily? But not so much that there is nothing left.
Or I could put a net up so the CNBG only have a small area to hide in?
right now I would say the creek is covered in about 60-70% of coontail and American pondweed.
Any advice would be greatly appreciated thanks