Brook trout would be the way to go. I would keep the pond smaller to keep the temp cooler. I had 1/2 acre pond with a 38 gallon a minute artisan well feeding it. I had my trout for one year to the day when we got a tremendous amount of rain in mid summer. It was so much run off rain all at once that the temperature of the pond got too high and I lost them all. If the pond does not have a lot of watershed feeding it when it rains it may be OK.
