How To Use Progressive Web App aka PWA On 420 Magazine Forum
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I use a DIY CO2 generator using 1-2 cups sugar, 1 Tbsp yeast and a 2 liter bottle with warm water. In my 4' x 2' x 5' grow box one bottle produces up to 2000 PPM CO2 slowly ramping down over the course of a week or two to around 600-800 PPM CO2. Make sure temps are above 85° or the supplemental CO2 is just a waste of time.