How does CO2 get in the tank? - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 04-04-2006, 11:42 PM Thread Starter
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How does CO2 get in the tank?

I have a dumb question. How does the CO2 gas get in the tank water? I have a hagen system and use my own diy yeast recipe. I get plenty of bubbles going up my ladder. It seems to me if the gas is in the bubble it dissipates when it goes up to the surface of the tank. Can someone explain how it works? At least point me to where I can find out. Thanks, Stretch
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post #2 of 3 (permalink) Old 04-04-2006, 11:50 PM
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If you look carefully, when the CO2 moves up the ladder, it diminishes in size. That's because the CO2 is dissolving into the water. Simple as that. The longer the dwell time, the more CO2 is dissolved. The principle is the same in reactors. They are just mixing up the water and CO2 to break it up into smaller bubbles to increase surface area for dissolution.
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post #3 of 3 (permalink) Old 04-05-2006, 02:08 AM
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Water is an almost perfect solvent. Lots of stuff will dissolve - go into solution - in water. Each of those things will only dissolve in water up to where the water is saturated with that thing. But, water can be saturated with lots of things simultaneously. Gases, such as CO2 dissolve in water, and like sugar dissolved in water, you can't see the substance that is dissolved.

Man! Am I a Chemistry teacher or what??

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