That's a great amount of run-off especially for a 1 acre body of water. You have a lot of water moving through the pond.
As such, I'm not sure how much you'll be able to treat pH. I don't know much about it, so we'll see what others have to say.
Excerpt from Robert Crais' "The Monkey's Raincoat:" "She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."
