Join Date: Sep 2003
Location: San Francisco, CA
I use a quarter teaspoon of yeast and a teaspoon of baking soda, Reg. Please keep a couple of things in mind before you get jealous, however. One, my house is hella cold. In the warmer months, the yeast does expire much more quickly. Two, I don't measure CO2 levels with an indicator. CO2 levels could drop significantly after two weeks for all I know. I simply use pearling and plant growth as indicators of CO2 saturation. And, three, sometimes a glass diffuser can clog even without visible signs of clogging and a quick bleach dip can yield a week or two of additional CO2.