Surface aerators are designed to ensure quality water management for ponds, lakes, and lagoons. When these devices are properly installed and maintained, aerators can ensure proper aeration thereby keeping water fresh, vibrant, and healthy. Good water management means protecting water so that people, as well as the environment, do not suffer. Today’s modern surface aerators are energy-efficient, highly effective, and affordable. Best of all, surface aerators can be installed with minimal disruption and in a short amount of time. If you are unsure of how much aeration you need, as a general rule, approximately one horsepower per surface area is sufficient, depending on the biochemical oxygen demand (BOD) for a lake or pond.