14 feet deep is the issue, given surface area. The deepest section will end up with little oxygen when the water heats up, unless you've reasonable flow in/out of the pond, as in a small stream. I've a 1/3 acre pond (SC, so temperature in the midst of the summer can get to 80 degrees in the pond), with an average depth of about 6 feet, and had a fish stocker (bream, bass, triploid carp for bass-food, personal comsumption and fun, and algae control, respectively) estimate what I'd need, and then I did a net search - got same answer. I'll be using a 1/4-1/3 hp aerator (5-9 amp draw) during the summer, probably on about 1/2 the day, but much less time in the winter. Not sure how you're going to get a modest sized solar panel to generate the amps needed, and suspect, if you don't go the windmill route, that you'll have to opt for a few batteries, a moderate sized solar panel, and a timer that will cycle the pump on and off within the limits the battery/panel combination will allow. If you have a modest fish burden, and a bit of luck, you might not need the aerator, but I'm going for lots of fish (so grandchildren can catch them very easily) and a feeding program, so don't want to risk low oxygen.