Mike:

If they are feeding on the snails, I doubt that they can crush the shells because they lack pharyngeal teeth.

I'll bet your pond is full now.

My neighbor just came back from Leech Lake and said the fishing was a month behind normal. How was your trip up nort?

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).