09-21-2006, 11:45 AM
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Bubbles create movement in the water and with the action of the bubbles breaking on the surface oxygenates the water, therefore, can help a tank with low O2. If you experience your fish frequently going to the surface as if they were gasping for air, then there is a strong possibility that the water needs to be oxygenated. Otherwise, you can use it if you like. Some people like the looks of bubbles in their tank. I don't really like the look of the bubbles, so I put my air pump on a timer and only turn on the bubbles at night. The reason is, I have plants in the tank. Plants take in CO2 (carbon dioxide) during the day and take in O2 (oxygen) at night, which is the reason I only turn on the air pump at night.