Abstract: A wastewater treatment system for deployment within a pond having a floor and a wastewater surface is formed from a plurality of floating modular aeration units that are fluidly connected to a motorized blower via a central air delivery line. Each of the floating modular aeration units has an aeration grid retained below the wastewater surface and configured to form air bubbles below the wastewater surface. A buoyant frame retains the aeration grid above the floor of the water pond at a pre-determined depth. Pressurized air is delivered to the aeration grid forcing air bubbles to rise through the water column to the surface and supply oxygen to the pond.