CO2 - 4mm vs 6mm
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Old 03-20-2013, 07:09 PM   #1
haruko05
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CO2 - 4mm vs 6mm


I've recently was on a trip to Hong Kong and saw some of the planted aquarium shop using a 4mm CO2 system instead of 6mm. The CO2 is suppose to be diffuse even more then 6mm and less gets wasted. They said CO2 tank is suppose to last longer because less is wasted. Anyone have experience with this?
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Old 03-21-2013, 12:25 AM   #2
Wasserpest
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Are you talking about the diameter of the tubing??

I don't think that would affect the diffusion rate or loss/waste in any way.
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Old 03-21-2013, 12:37 AM   #3
kevmo911
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Just to be clear, if it *is* the tubing, you're definitely sure it's two different sizes? I ask because standard Asian CO2 tubing has a 6mm outside by 4mm inside diameters.
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Old 03-21-2013, 03:02 AM   #4
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I don't see how tubing would affect the efficiency of CO2 delivery. You could use a garden hose as long as it was airtight...
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Old 03-21-2013, 06:11 PM   #5
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The sales was telling me in the last year, the new regulators coming out uses 4mm outer diameter co2 tubing. He said the CO2 becomes finer so that more of the CO2 stay in the water instead of escaping to the surface and lost.
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Old 03-21-2013, 09:34 PM   #6
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Quote:
Originally Posted by haruko05 View Post
The sales was telling me in the last year, the new regulators coming out uses 4mm outer diameter co2 tubing. He said the CO2 becomes finer so that more of the CO2 stay in the water instead of escaping to the surface and lost.
It doesn't really matter if you are using a diffuser/reactor in the end.

If you use a smaller tubing diameter, then the diameter of the CO2 bubble will be smaller, but I don't see how it will be "finer" (a finer...what? It can't be a mist without a diffuser, and if you are using one, it wouldn't matter what size the diameter of the tubing was).
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