Running an air pump year-round in your pond is an excellent idea as it will supply plenty of dissolved oxygen for your pond’s fish. Having a healthy level of oxygen in your pond will help reduce stress on your fish, and at the same time increase how active your fish are! Next to a water pump, I feel like an air pump is an important necessity for a pond. An air pump should be allowed to run 24 hours a day, and your best bet is to run one large size diffuser (air stone) in the deepest part of your pond. I suggest elevating the air stone off the bottom of your pond by about 8 inches. An easy way to do this is to use a terracotta pot that is flipped upside down with the diffuser placed on top. It is best to place the air pump about 6 to 10 feet from the pond and to place some sort of housing over it to protect it from the elements.
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