This can be hired out with folks who use liming barge. Call me if you want price. As mentioned by ML a good method is spreader truck. Only problem is you have to be able to drive to several places around the pond. If you can ask for spreader truck that runs off PTO this allows the truck to backup to pond shore and shot it out instead of having to drive around keeping the drive shaft moving. This lime then hits the water and really spreads. Good Luck you are right with low alk fertilization is a waste.

Greg Grimes
www.lakework.com