Funky,
What is in your pond and what are your goals? If you have no BG or HBG in there now I would not necessarily just throw some in. Do you have predators already? Are you predator heavy?

If you don't have predators then GSH can be a good forage fish to work on before mixing in BG.

FHM didn't last long in my pond and I have zero predators, but I do have a few RES and LES and quite a few YP and they clean up the FHM in a matter of a few weeks after stocking.