DIY co2 problem, help please
I set up two, 1 litre bottles on the 28th of December, and today, January second, the bubbles stopped climbing my ladders. The Co2 stopped coming out all together. I used a recipe that should last atleast two weeks, if not three. The recipe is one cup of sugar, and 1/4 TSP baking yeast. mixed those into the liter bottles and filled them up with luke warm water until the water level was about three inches below the top. Then i shook the bottles vigorously and attached them to my cap with small hole and tubing. 1 day after i set up the bottles i had bubbles once every four seconds, now none at all. What happened? I know the best idea would be pressurized, but i would like to keep using the yeast method until farther down the road. Any ideas for a better, sure fire recipe that wont collapse on me, or any ideas why mine stopped producing?
All the feedback would be appreciated.