Pond is appx. 3.5 acres, surrounded by trees , have two places where a lime spreading truck could back up to the pond . had 11 tons added . had 4/8 sheets of plywood on the ground for the truck to back on to save damage to the shore surface. didn't cover entire pond surface with lime but it seemed to work ok. do plan to add lime to the land around the pond to help the seepage of tannic acid from all the fall falling leaves. this is the lazy mans way to lime. but liming around the pond will be hard work. JB since your experianced , Want to help ? LOL.Harvey