Feel free to contact me with your questions. I have been managing a fishery similar to this for some time now and it does present unique challenges. I don't know how successful that diverse fishery would be in a micro setting of .5 acre pond. If possible I would instead create other micro ponds and specialize the fishery for 1-2 species. That's what I'm doing on my four micro ponds now...will be far easier to manage and goals will be much easier to attain I am now witnessing.

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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