My pond at full pool will be around .4 acres. Right now it's about 1/4 acre with avg depth of 5-6'. I took a 5 gallon bucket, dropped a sump pump down into it. Ran a hose into the bucket and then a hose from the pump. One of us dumped chemical into the bucket and the other took the hose from the sump and sprayed it out into the pond. Worked quite well. I did 100# of alum and 25-30 of Lime.