So what would be the northern boundary for LCS? I have not read anything suggesting a reason for a northern boundary at all, really?

I would like to try some in my pond as I already have FHM and GS, maybe by adding some LCS there would be enough variety that all three could sustain a population.

Just by watching the 25 bass I have in my pond over the last three warm days I can see why FHM dont make it very long. They are getting pounded literally by the minute by the LMB "patrols".