Since my lake level has dropped nearly a foot this year due to the lack of rain approximately 10 feet of bank was exposed. I spread 200 lbs of slow release 16-4-8 on to the shelf to aid shoreline veg growth (which it has). The lake was clear to about 6 feet and now the visibility is approx 12". Lake color so far has gone from very light green to almost brownish in color. PH is about 8.2 and water temp is staying between 82-84 degrees. I am surprised that with the fert that I used it affected the 12 acre x 9' deep lake that much considering I was very careful when spreading it out to stay away from the waters edge. How long will it be before things start to clear back up? Thanks.