Captain Don -- give us a report. Yellow perch are pretty tough when it comes to low winter D.O. The bass and bluegill probably start to go once you dip below 2 ppm. However, the perch can survive well under 1 ppm.

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From Bob Lusk: Dr. Dave Willis passed away January 13, 2014. He continues to be a key part of our Pond Boss family...and always will be.