Thanks for all the advise gentlemen. I havent done a real application of the alum yet I just now got the hydrated lime. In the post that you've recomended and sugested yourselves pre mixing the alum into a slurry is the best way then spraying it. I'm trying to come up with the best way to do that. Has anyone ever tried a texter gun for sheet-rock for blasting the alum into their ponds? lol