I've had a lot of bullfrogs on my pond since it was built three years ago. I still have a lot of really big tadpoles. I used to think I would take a few of the big bullfrogs after July, when the season is open, but my wife and I really like the deep calls they make. One will go off on one end of the pond then the whole perimeter will start in. Ours have gotten fairly large over the years, but not as large as DrLuke's in the first post. Lots of coon tracks, and almost continuous heron activity has kept the frogs from over populating.

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023