Does the movement of water supply oxygen to fish?



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    Fish need oxygen just like we do. Fish who live in still water environments tend to stay closer to the surface because the water near the surface has more oxygen. When the water is circulating, that oxygen-rich water can move to lower depths, as can the fish.

    This is one of the reasons that aquariums with pumps are better for the fish, and the fish will spend more time near the bottom, whereas in a small bowl or a non-pump aquarium, the fish will tend to spend more time closer to the surface.

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