i tried the yeast and sugar , but find the baking soda/ vinegar works very well .... when using this method , lay out a paper towel
and spread about 1/4 cup of baking soda , then roll it up and drop into 1 gal container about 20% full of vinegar ... every
so often , shake and you get more co2 , eventually , you will add more vinegar and start all over .. vent the co2 while you
run a small fan ...
*** something i just discovered to do with my shark steam cleaner ... raise humidity in the grow room and mist the plants too !!!
the steam is super hot about 1/8" from the nozzle .. at 2 inches , it's just a cool mist ... so i turn o the fan and steamer for
a few minutes , shut the door and relax ..