The Planted Tank Forum - View Single Post - Affordable CO2 sensor?
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post #42 of (permalink) Old 11-14-2012, 10:04 PM
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I think I read that most thin plastic films are gas permeable to some extent. But, to get much gas through them the film has to be very thin. Silicone would seem to be a good candidate, since it is one of the most "leaky" plastics used for hoses.

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