I lime the pond I really care for about every 3-4 years. I test the water myself and do so when the test tells me to. It can be driven around very easily and I go out a day before and mark of 4 spots with flagging. When the driver brings the truck, I have him look over the bed and add about 1/4 of the load in each spot and have him crank up the RPMs to send the lime flying.