I like 2:1 slopes, the only drawback is that I can't seine too well, or at least not effectively as I'd like to. I love how my vegetation remains in a distinct ring around the pond. A few feet of 3:1 then the drop is actually how my pond is, now - due to erosion siltation etc.

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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