Quote:
Originally Posted by wood
Ya see the problem is not the time it takes for the yeast to die off, but instead the amount of wasted CO2. The yeast could die off long before I run out of CO2 if I could figure out how to safely do this. Achieving the least amount of wasted CO2 would really help especially in the long run. Perhaps instead of using (2) 2-Liter coke bottles, why not something stronger? The reason why the bottles burst is because of the plastic. The plastic can't hold up to high pressure. The reason why CO2 canisters are metal.
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Hey there Sparky, looks like you have a few ideas mixed up. First of all CO2 canisters are seamless metal because at room temperature CO2 remains a liquid above ~800 psi. Yeast survival is limited in both the % alcohol and CO2 pressure.
Next, DIY is cheap (~$5 to start!) but requires a lot of work. Compressed is expensive (>$150?) but goes for months (or years). The old time or money balance.
The 3 x 2L bottle idea will work as follows: The gas generated in container A with increase the pressure evenly in A, B, and C and eventually generate bubbles in the aquarium. At that point the pressure in the reservoir is stable and each unit of gas produced in A goes directly into the aquarium. No appreciable volume of gas is "stored" (ok, about 4L at 2-10 psi) with the major effect of increasing (>3X) the time for bubbles to start.
So as posted elsewhere, rotate 2 or more bottles for consistency and lean out the yeast/add backing soda to increase the duration of a charge.
