co2

does any body know how much c02 will be realsed doing the sugar and yeast thing my grow room is 2.5x1.5x5.I would like to know if it is worth it. where i live you cant just go and get a tank raises too many question where i live. ther is no hydro store for 700 km. any help would be great

It's actually not alot, this method in a 2 litre bottle barley bubbles. I would just set up 2 and the only problem is you cannot control the amount that it feeds. At 12 off it's still going and it works about a week long then you need to change it.

so got any ideas that can help i dont want to have to run three or four bottle at a time

This is the most cheapest method on the market.

will it work if for a 400hps grow because that is what im using its a cooltube one

Ya just set 3 up and place them in the middle of your plants. just make sure to pull them out during the night or you''ll end up with c02 burn.

so 3 2liter bottles right and that will icreaseit to at least to 1000ppm maybe

sugar and yeast method will not increase your ppm to 1000. Sorry it just wont.... Of course if you have a 100% sealed room then MAYBE.

well natural air has anywhere from 300-500ppm and if the three bottles in a sealed room ( which mine is) should get me close then i should an increase ib growth. the only air i have comeing in or out is ftorn tubes. I built the box from parts and a wardrobe which i sealed completly its so quiet you cant hear or see anything (or smell). thanks for your help very helpful