If you pour in the alum without turning it into a slurry, it will sink to the bottom and get covered with what little debris falls to the bottom. This renders it effectively useless as it will not mix. You have to dissolve a 50 pound bag of alum in about 55 gallons of water and spray the alum on to be truly effective. You could pour it into a trolliny motor prop wash but spray is by far the most effective. I use a 40 gallon ATV boomless sprayer that sends a 30 foot spray.
Last edited by Rainman; 07/05/08 08:45 PM. Reason: spelling, or lack of....