Dave, The pond log is the name of a relatively new product specifically formulated with polymers to rapidly floc suspended solids from water. It was first designed for construction soil run-off control. Set up correctly in stages 1000's of gallons per minute of muddy water come in and crystal clear water flows out. It appears to be getting some very good reviews and is relatively inexpensive at about $100 per "log". The company does a free water sample test, sends you the results along with the formula number/qty required.
