The Planted Tank Forum - View Single Post - Using inline co2 for o2 instead
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post #8 of (permalink) Old 02-26-2013, 04:54 PM
Hoppy
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CO2 easily dissolves into water in large quantities, compared to oxygen, which doesn't easily dissolve into water. Those air bubbles are very unlikely to put much oxygen at all in the water. A wet/dry filter is a good way to dissolve a lot of oxygen into the water.

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