A great way to maintain a healthy pond, in addition to filtering and circulating the water, is through aeration. Aerators ensure that fresh oxygen is entering the pond through the diffuser, preventing stagnation and oxygen depletion. This keeps your fish and plants healthy, while in some cases inhibiting a large amount of algae growth. An aerator can also prevent pond turnovers by maintaining high levels of oxygen throughout the water. Keeping your water feature clean and healthy is the best way to keep your pond looking great every season.