We have a low tech way of distributing gypsum in our 6 acre lake. We put a piece of plywood across the bow of our jon boat and pour gypsum onto the plywood from the 40 lb bags that we get at Home Depot. Then we blow it into the lake with a leaf blower. Using a three man crew (one on the trolling motor, one of slit the gypsum bags and pour it on the plywood, and one to man the blower) we are able to distribute gypsum at the rate of 2000 lb/hour.
