I think that's usually how it works...you start small and then think...hmmmm, this is great why did I make such a small pond...Next thing you know you end up with a lake in your yard.
I just love yours though. Is the large part all above ground?
Afgreyparrot(Cindy) can attest to that. She has a big old pond she dug out.
BTW, if I don't answer your next PM it's because I popped over to my parents--they live across the st and she made me a coffee.