The more I think about this pond stocking the more I am leaning towards not even adding LMB. Could the pond sustain itself with the species I have already added and just HSB. I would do a put and take system. This brings up a couple of questions.

Would GSH and RES take the place of BG in the food chain?

Would RES or GSH get out of control over time? And if so, would adding more CC be a good alternative for population control?