canyon - If you truly have the desire to have some RES, IMO you would do well to get some RES brood stock from the MI lakes were over many years they have genetically adapted to the variability and harshness of southern Michigan winters. Tolerant survive, intolerant are eliminated. You would not need very many to produce your first crop of cold tolerant YOY RES. I highly suspect all those RES you originally stocked did not survive.
Last edited by Bill Cody; 01/24/20 03:28 PM.