Bottom-Up Aeration Keeps Ponds up to 4 Acres Healthy Year-Round

The Airmax PondSeries PS40 with 4 diffusers delivers professional-grade bottom-up aeration for ponds up to 4 acres (1.6 ha) and up to 50 feet (15 m) deep. The whisper-quiet SilentAir™ 3/4 HP rocking piston compressor uses up to 60% less electricity than comparable systems while producing substantially more airflow. Four ProAir 4 weighted membrane diffusers rest on the pond floor and release millions of micro-bubbles, lifting oxygen-depleted bottom water to the surface, eliminating stratification, reducing muck accumulation, and protecting fish through winter ice events.

ProAir 4 Weighted Membrane Diffuser

Unlike traditional air stones, the ProAir 4 uses a flexible membrane stick that resists cracking and never requires acid washing. An integrated check valve protects the compressor from back-pressure, and the sled-style base keeps the diffuser upright on the pond floor during installation and service. Non-stick Teflon coating prevents debris accumulation.

System Specifications

Tip: For 1 acre at 3–5 ft depth, 2 acres at 5–9 ft, 3 acres at 9–12 ft, or 4 acres at 12+ ft, consult the coverage chart when sizing this system for your pond.