Update:

Applied Polymer says the Floc/Pond Log lasts 3-4 months and treat's 325-500k gallons of water. I estimate 2.6 million gallons in our pond. I did find a better rate of $125/log, but this method is still quite expensive.

If we leave the muddy water as is, what is the effect on the bluegill and bass? Last year, we did get a lot of weed growth underwater so I guess it's not THAT muddy; it's just ugly. Maybe we'll just put some dye in the pond to make it look a little nicer.

Our goal is recreational fishing and a somewhat "prettier" pond in the backyard.