Finding the sweet spot for SMB - I hear you.
All I know is that Dave Willis has suggested RES may hold their own with SMB and Mark Cornwall suggests GSH may also keep up with predation from SMB and establish a stable forage base season after season. You can always supplementally stock GSH from time to time.

Many men go fishing all of their lives without knowing that it is not fish they are after. ~ Henry David Thoreau

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