FYI-
"It is more difficult to apply lime in ponds that are full of water, but this is more often when ponds are limed. The lime needs to be spread across the entire pond surface as evenly as possible. Remember, you are liming the soil, not the water! For small ponds (less than 1 acre), it may be possible to back the spreader truck up to the pond in several locations and broadcast the lime. For larger ponds, it will be necessary to load the lime onto a boat or barge and then shovel or wash the lime uniformly into the pond.
If you have one or two jonboats, you can make a simple liming barge. One boat works well but cannot handle very much lime at a time. Two boats tied together is best, because these boats can handle more lime per trip. Attach a large sheet of heavy plywood (� inch or larger) across the bow of the boat(s), and load a safe amount of lime. You can shovel the lime across the pond or use a spray washer. Using a standard water or trash pump, pull water from the pond and spray across the lime pile, washing it into the pond."
- Mississippi State University Extension Service
