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Re: CO2 home made--HELP

> Another question with lots of thanx if answered. Well, I plan to build the
> 2L soda plastic bottle yeast and sugar mixture for CO2 providing. I got a
> question which answer I couldn't find anywhere: what about the pressure
> inside the bottle? can it raise too much? What if it rises to much, is there
> any danger of explosion? did someone figured out some kind of safety valve

Don't use any type of valve with a DIY yeast setup.  Yes, the pressure 
can and will cuase a 2L plastic bottle to explode.

When using DIY co2, you reduct the CO2 level several ways:

1) use less yeast in the mixture.
2) use a less efficient reactor
3) Increase surface disturbance using an airstone