Thanks to each for the inputs. The spawning unpredictability factor and its implications to management intensity are somewhat daunting. If this were the only pond, or even the last pond I'll build it might be different. This sounds like possibly too much to bite off with everything else. If professional assistance were available nearby, then it might be different. I think you guys have talked me out of this one. Another F1 LMB pond sounds better and better. Thanks.