In order to oxygenate your fish pond, you will need to use a pond aerator. This is essential if you want a healthy fish pond or lake regardless of the season. In summer or winter, an aerator is needed to provide oxygen within the fish pond. During colder weather, a fish pond aerator supplies water movement at the surface to prevent the top of the pond from freezing. This will allow oxygen to flow through the hole and provide a means for toxic gases from decomposing organic matter in the fish pond to escape. If you are in the market for a submersible aerator, please browse our selection of aerators.