CO2 tubing - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 09-12-2006, 10:37 AM Thread Starter
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CO2 tubing

I was wondering about some tubing I found for DIY CO2. It was at Lowes, black vinyl tubing for lawn sprinkler systems. It is the right size and grabs onto normal aquarium fittings.

Would this be better than the standard airline or silicone line?
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post #2 of 9 (permalink) Old 09-12-2006, 11:26 AM
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I would only use silcon tubes, because I would guess the lowes vinyl stuff would break down faster and then leak.
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post #3 of 9 (permalink) Old 09-12-2006, 04:32 PM
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Lower numbers are better. Silicone is not very good at all.
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post #4 of 9 (permalink) Old 09-13-2006, 02:54 AM
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Lower numbers are better. Silicone is not very good at all.
lower permeability numbers would indicate less co2 loss, i presume. if so, vinyl is superior to silicone; is the aquarium airline tubing made out of vinyl? thanks.
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post #5 of 9 (permalink) Old 09-13-2006, 03:16 AM
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Airline tubing can be either vinyl or silicone. Vinyl is normally clear or black. Silicone is normally green or blue.
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post #6 of 9 (permalink) Old 09-13-2006, 03:22 AM
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"lower permeability numbers would indicate less co2 loss, i presume."

Correct.

"is the aquarium airline tubing made out of vinyl?"

Some is, I think. Hopefully someone else can chime in with a more specific answer. I know the blue stuff that's pretty common is silicone. Nice and flexible. Vinyl is a bit stiffer.

This place sells all kinds of tubing:

Plastic Tanks, Plastic Buckets, Plastic Bottles and Labware, DVD Cases - United States Plastic Corporation

Most has a 10 minimum foot order, but much of it is less than a buck a foot. I bought Tygon Fuel & lubricant (which has a number even better than vinyl) for $0.65/ft

BTW, THANKS to Rex for originally posting the link with the tubing specs. I found it helpful.
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post #7 of 9 (permalink) Old 09-13-2006, 07:58 AM Thread Starter
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Well I will use this Lowes tubing then. Black looks cool.

The I.D. is the same as the clear stuff, but it has a thicker wall. So thinking even if CO2 can leak out it would take longer.
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post #8 of 9 (permalink) Old 09-13-2006, 10:43 AM
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lower permeability numbers would indicate less co2 loss, i presume. if so, vinyl is superior to silicone; is the aquarium airline tubing made out of vinyl? thanks.
Vinyl is superior to Silicone for permeability, but it will get dry and crack easier.

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post #9 of 9 (permalink) Old 09-13-2006, 12:17 PM
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Tygon will be the best tubing you can get for CO2 applications. It has a balance between CO2 permeability and effective lifetime of the tubing.
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