I�ve pondered over the idea of using a 30 or 55 gallon barrel to make what is called a chemical feed pot. I haven�t tried it myself, so there�s no guarantee it�ll work, but I think it will. Besides, not much is lost if it doesn�t�. lol
Use two 2�X3/4� barrel plugs to install a water hose connection into each of the barrel's 2 bungholes. One is an inlet, the other is an outlet. Install a valve on the outlet side.
Remove one plug and pour a large amount of alum into the barrel. Lay the barrel on its side near the pond. Connect a water hose from a pressurized water source to the inlet, and connect another hose equipped with a spray nozzle to the outlet.
Turn on the water to fill the barrel, and crack the outlet valve to bleed the air. Once the barrel is full, open the valve further and begin spraying the alum enriched water across the pond�s surface, occasionally rolling the barrel around to promote mixing.
Edit: After further thought, I've concluded that the valve on the outlet may not be necessary. The spray nozzle on the hose will act as a valve.
