Thanks, TJ. When it comes to that, I DO NOT want to be a papa. Bill suggested just a few SMB. I think he said 15-30. I never thought through whether they would reproduce or not.
As far as the cobble goes, if you are talking about the first picture, that is what I will be using to line the spillway. So it should stay out of the pond proper. The bottom of the pond itself should be pretty free of debris. Maybe the occasional rock that has rolled down, but otherwise, just clay and smooth ledge.
Backstroke
