If you end up with 20-30 per acre, I think that's a decent number to allow growth of the HSB, and not have too many of them. They are feed hogs and will take up biomass in the pond. And while the HSB don't reproduce, your LMB will most likely start spawning in the Summer of 2025.
I'd wait and see on the HSB.
HSB do school sometimes, but not all the time.
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