For someone when I go to the last page of the mega basic cultivation thread I am unable to make a new post, even though it appears to me that it has not been closed. Very odd.
I wanted to ask, a question on behalf of my friend who is considering growing cannabis. He intends to grow in quite a small covert cultivation cabinet constructed using MDF. To increase yield, he would like to increase atmospheric carbon dioxide levels artificially. Unfortunately the tanks of this gas and the valves etc. seem to be generally very expensive, so he is wondering about alternatives to use. One way he was thinking of achieving a continuous, steady production of CO2, is through the fermentation of yeast, as done by brewers who produce alcohol. Would this be possible? I assume this would be okay, given the fact that his grow cabinet will be small - much smaller than a growing operation out in the open in a normal sized room. If this is possible can someone give me some tips and advice about how he would go about doing this? I know it is not 100% necessary but I think if he does do this he could potentially get bigger better buds, or so I have heard (and this does make sense as AFAIK plants do thrive when CO2 levels are high).
Edit: Oh yes, there's one my question I would like to ask. Is this light shown below, which is an energy saving light tube device containing two 36W tubes and is used to treat people with seasonal affective disorder, able to be used to grow perhaps two marijuana plants? I don't mean grow really well, I mean just to grow, period? My friend would like to use it to grow males just for their pollen to pollinate the females. He needs to keep them separate from his females which are growing under a 600W HPS light in another room.