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post #1 of 5 (permalink) Old 07-28-2013, 12:20 AM Thread Starter
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co2 opinions

I did the standard recipe, 2ltr bottle, 1/2 tsp yeast, 1tsp baking soda, 2 cups sugar. My question: Is it better the longer the gas is trapped inside the diffuser? I'm using the top of a little water bottle. The airstone is under it(like a dome). I poked a few holes in the cap. When gas builds up it bubbles from the holes. I' not sure how long between bubbles are. It's at least 1 minute or so.
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post #2 of 5 (permalink) Old 07-28-2013, 12:52 AM
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Yes the longer the Co2 is in contact with the water the better.
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post #3 of 5 (permalink) Old 07-28-2013, 03:08 AM
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More contact time with the water means more co2 gets dissolved into the water, which is what you want. Every bubble the floats to the surface and pops is essentially wasted gas.
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post #4 of 5 (permalink) Old 07-28-2013, 04:03 AM Thread Starter
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Nice! The gas sits in the dome for at least a minute and even when it bubbles it still has gas in it.


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post #5 of 5 (permalink) Old 07-28-2013, 06:29 AM
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If you have the CO2 bubbling through an airstone, that is then being captured by an inverted soda bottle (like a bell), then it will not be too effective at forcing the CO2 into the water column. Passive diffusion is not as effective as active diffusion (which your airstone essentially is).

Rather than trying to trap the CO2 bubbles in a bell, it might be better to have the bubbles from the airstone blown around by the output of your filter or by a powerhead.

Anthony


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