the day I put the alum out it was very windy and so the only areas that were starting to clear were along the north shoreline out of the wind. Out in the middle i could tell the alum was binding the clay and making visible clumps and starting to clear but I had to leave before I got to see the final results. Hopefully it worked and when I go back this weekend it will look better. If its still muddy looking would you add more alum?