The deeper the diffuser plate is placed in your pond, the more area it can effectively aerate. Shallow ponds or ponds with irregular shapes and bends, require more diffuser plates per surface acre.
In shallow ponds, the column of diffused air is not able to open as far which limits the effective area of each plate. The bends and curves in irregular shaped ponds block the circulation provided by an aeration system, which creates the need for more plates to reach isolated sections of your pond.
As diffused oxygen leaves the diffuser plate, it rises to the pond’s surface in a V pattern, creating a current. The higher this pattern is able to rise, the wider it becomes which allows it to circulate a greater volume of water.