Update:
Clarity is up to 22 inches and water is taking on a definite green color due to an increased algae bloom. I'm assuming as the clay settles the algae is taking over which is not a bad thing. I have several times the carrying capacity for a pond this size due to feeding so nutrients are probably prolific.
Brian, if bullheads are your problem the aluminum sulfate treatment may only be a temporary fix. You need to get those bullheads out somehow first.
As far as using straw I have sources that say if you go this route it should be hay -- not straw. I am skeptical of much success with even hay as I have an aquaculture book that does not have much faith in it either. You also run the risk of D.O. problems with the hay as it decomposes.
