I plan on Koi. Not that many, I generally understock tanks and ponds. I plan on getting good quality Koi at about 6". I can get imported from Japan locally or drive to a Breeder in Toronto. I'm no Koi expert but like the look of Koi in a pond.
The pond is almost 5' deep in the middle and most ponds if 30" deep in Canada will allow you to overwinter the fish under the ice.