I’ve received so much great advice here. I think I’ve driven some of the more knowledgeable guys here crazy with my worries, and my dumb questions. The amazing part is, this was a trash filled ravine a little over five years ago. It sure goes fast. I had one grandchild when we started this project (he’s not pictured) now we’ve got six!

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