jpsdad, I'm coming around to the logic of managing the pond biological productivity indirectly by managing the turbidity, which in turn means managing the common carp population given the positive correlation between Common Carp and LMB standing weights. It may only take a few fish to achieve the right balance. As of now, I'm 90% confident I have them all out, at least the large ones. I could start by adding one big one from an adjacent pond that has some monsters in it. The other concept is to add more than one of the same sex carp if there's a way to determine male vs. female (probably is, I just haven't looked into this). Thanks for your guidance. Radically changed my thinking on managing the situation.