Good reply, MikeNap!
It sounds like your planned pond expansion should have enough watershed to stay full most of the year. If it only draws down at the end of summer, then that sounds like a very good pond to me.
If you already have a CC/LMB pond, then that would make me lean towards NOT having CC in the SMB pond! Further, you could always add some CC brooders later to the SMB pond if you don't like how it is working out. It is much more difficult to later remove a fish species that you do not want!
