Great looking project V! Welcome to the forums.

I personally would not add the Koi to the fishing pond, if so, only one. It seems that popular opinion is that they can overpopulate and stir up the water a lot making it muddy. Many people have them in there larger ponds and are good with it, but there has been a lot of effort for some folks to get them out of their fishing/swimming ponds.

As far as the danger of them getting eaten?... there is a golden rule of thumb for that...

If the smaller fish can fit in the larger fish's mouth, the larger fish will eat it.

I can't help you with your stocking plan because I'm too green in the pond world and our climates differ quite a bit. One of the first questions you'll get from the experts here is...What are your goals for the pond? Do you want to raise the fish for table fare (and how much time/money are you willing to put into it)? Do you want to catch trophy fish? OR just have fun catching fish with the kids? The questions are numerous. These are just the first to come to mind.


Fish on!,
Noel