How many of you use the DIY jello co2 model?

[hungtran10]

I recently embarked upon the DIY co2 yeast mixture/soda bottle "adventure." I was searching the forums to find a recipe that would yield the longest co2 output and came across a recipe that uses jello.

I was curious as to how many of you guys use this jello recipe and how long your co2 lasts before you have to prepare another batch.

Thanks.

- Hung