Here is a picture of my thought on an easy way to mix alum in water and spray it over a pond. Set the bucket in water nearly up to its rim either off the pond bank or over the side of a boat. Feed the dry alum into the water being sucked into the hose and it will get mixed as it runs through the hose, pump and out the nozzle. I have not done this but expect it to work. May need to add more holes to allow water into the bucket if I need it to run flat out without sucking in air.
Pouring the alum into a bucket like that would result in one huge chunk of alum.
Alum and Hydrated lime have to be heavily agitated into a slurry to be sprayed. I designed a rotating agitation bar in a large 275 gallon chemical tote. I use 2 2" trash pumps...one pump keeps the slurry agitated and the other pump supplies the spray nozzles. When not using the boat on smaller ponds, I use the same tote/pumps, but spray using a 1" ag hose....spraying alum/lime properly is not an easy job at all
