It's been about two weeks since I threw the bubbler in the pond, and
while the clear area is not static (it shrinks and grows), it does
encourage some optimism.

http://i181.photobucket.com/albums/x.../aug262009.jpg

On another note a night heron visits the pond in the late afternoon.
It's a stocky bird, and it doesn't really look like a heron at all
until it stretches its neck out. It usually keeps its neck close to
its body and its chin down. I have no idea what it eats.