01-27-2007, 04:28 PM
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Originally Posted by soco1125
If it's an airstone it shouldn't hurt anything unless you're trying to grow plants. I only run airstones at night because that's when plants use oxygen instead of carbon dioxide.
Of course, your airstone emits air into the tank which contains CO2 as well as O2 (and all the other gasses too). Therefore, the CO2 will benefit the plants in the day, the O2 for the night and for the fish day and night. I really do not see that you can over oxygenate.