CC are supposed to be at least 3 yr old before they spawn. They can spawn in a 1/4 ac pond and have some spawn survive. They did in my pond. Daphnia are easy to raise, and you could probably raise enough in a 10 gal tank to add some to your pond on a regular basis. If the fry and fingerlings eat them as fast as you put them in, that would be a minor plus, and if some survive and multiply in the pond, so much the better. I stocked CC, LMB, BG, and RES in my pond, and it seemed to manage itself very nicely. I stocked 25 of each the first year, and then 25 more CC the second year. I planned to eat the CC, but never did. They thinned out to about 10 adults after 9 yr. I don't know what was happening to them. Maybe a GBH was getting them.
