Co2 proof tubing why its better than silcone Pic on link

[marcus russo]

Well I finally got around to taking some pictures of the co2 resistant tubing eveyone has been asking about. I also have a little write up on it for those that are interested.
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Normal airline tubing can lose up to 20% of [acronym:40f5eef9bc="Carbon dioxide"]CO2[/acronym:40f5eef9bc] through its membrane.

Silicone tubing reacts w/ [acronym:40f5eef9bc="Carbon dioxide"]CO2[/acronym:40f5eef9bc] and render it less efficient (thus the silicone hardening over time under [acronym:40f5eef9bc="Carbon dioxide"]CO2[/acronym:40f5eef9bc] usage). Silcone tubing also once hard is not pliable @ all leading to cracks in the tubing. You can buy 6 ft of silicone tubing in most pet stores for 99 cents.
Upon first use of silicone tubing it is ver soft, almost to soft.

Our special [acronym:40f5eef9bc="Carbon dioxide"]CO2[/acronym:40f5eef9bc] Resistant Tubing loses less than 1% of [acronym:40f5eef9bc="Carbon dioxide"]CO2[/acronym:40f5eef9bc]. Also perfect for saltwater use (eg: Kalkreaktor). Rated Class I for both [acronym:40f5eef9bc="Carbon dioxide"]CO2[/acronym:40f5eef9bc] and saltwater applications. Unlike other so-called [acronym:40f5eef9bc="Carbon dioxide"]CO2[/acronym:40f5eef9bc] Tubing which is rigid, ours is soft and flexible and bendable.

Choose between
transparent green,
transparent blue and
black. 4/6mm -[acronym:40f5eef9bc="Identify"]ID[/acronym:40f5eef9bc]/OD.

Pics here
http://www.fish-forums.com/board/download.php?id=627