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Re: Silicone tubing and CO2
Wayne writes:
> I have heard this repeated before but I don't buy it at all. Silicone tubing
> does harden a little bit over time but it lasts many years. I have tested
> the tubing by placing my yeast sugar system under water and clamping off
the
> end of the silicone tubing line. There were no detectable leaks at all let
> alone a loss of 30% of the gas. In my test situation the silicone line was
> under considerable pressure too. In actual practice the pressure in the CO2
> line is vanishingly small or even negative. Perhaps silicone tubing leaks
if
> it is under 40 psi pressure but it sure doesn't seem to at low presssures.
The way that gas passes through a membrane, it would come out the other side
a single molecule at a time. There would be no bubbles.... hey!! maybe this
would make for a good diffuser if you stuck , like 20 feet of it in the
substrate and just let it seep up into the water column.
Bob Dixon