<human>:  How do I increase the oxygen flow in my fish tank?
<bot>: The best way to increase the oxygen flow in your fish tank is to make sure the water is properly circulated. You can do this by using an air pump, installing a powerhead, or using a water filter or circulation pump. To maintain an adequate level of oxygen, it's also important to keep the water clean and free of debris and to keep the tank away from direct sunlight.