Is it safe then?... felt as though i had to open a window it was kinda stuffy in there - will i be ok to sleep in the same room - i was reading somewhere that too much co2 can be bad for the roots - i hope i have made the right choice since i am a newbie i have no way of measuring ppm etc....
lol u will be fine, i would open the window for yourself tho, dw a few 2 ltr bottles with yeast and sugar aint gonna raise CO2 significantly for u to worry much, if u had 2 gas cylinders running then i would worry more lol
trust me there wont be a high enough level of Co2 coming out for you to worry about your roots lol, if peeps use it to aerate the plants in an aquarium with their fish, i dont reckon its gonna be near toxic levels do u?
Well im still here provocateur... damn it is a yeasty boozy smell when you shake those bottles up, hopefully they are doing the trick and the plants are partying in there. I moved the bottles up so they are sitting on the soil in the pots so that the c02 gets released from the top of the bottle directly into the tops of the leaves of the plants as i heard co2 is heavier than 02 and that way it moves down the plants.
We used to use "co2 tablets" to euthanize fish where I work--they're just alka seltzers. I haven't priced 'em but you can probably just buy generic alka seltzer at your pharmacy and save some cash.
Dry ice can not be controlled and in most spaces would add too much CO2 and damage the plants. A person would have to use a very small chip everyday so as to not over do it. Seems like a pain when there are much better solutions and some for much less money.