I like the pond as your "big aquarium".

However, it appears that you may be adding some species that will extirpate some of your other species. (Like adding two angelfish to a tank full of guppies.)

Your ecosystem is VERY complicated with lots of moving parts. Hopefully, you can get an expert to reply. Even with expert help, I think you will need to plan on lots of trial and error attempts.

Have fun with your new pond project!