The pond is 1/4 acre exactly. Die off proof sounds excellent! Tell me more!
You're right, it did clear up right away. As weird as this sounds, I have heard of putting a few sheets of sheetrock into a muddy pond to clear it up. I haven't had any experience with this though.
My pond does rise and fall with the water table, but runoff keeps the water level somewhat higer than the water table. I would like to know more about your thoughts too Bobad.