whats the best co2 for the price?

Im starting to look into using co2 in my grow. I've been growing for over 9 months and
i upgraded everything else to add to my yield. currently Im running at 2.5oz per plant with 4 weeks
veg time. I would like to keep increasing my yield and that's what made me so interested in using
co2. my local grow shop superior grower supply had a bag of co2 called exhale for 30
dollars a bag that each last about 3 months i believe. i want to buy two bags grow my veg tent
to start and another 2 for my flowering tent. i have two tents. one 3x3 and one 4x4.

my question is has anyone used this product and if they have seen any noticeable difference.
this is a hobby for me and i can't afford a high tech co2 system. Im so small time I don't
want to waste my money on such a system. if exhale is no good what are some other products
for co2 that people have seen work? i don't really wanna do the whole water sugar yeast thing

If heats not an issue then propane is the cheapest source to make CO2. Never used the stuff your thinkin of, but I use a very small propane torch in my flower room which is small...can't use it in the summer due to heat issues tho. I just run it for 15-30 mins when I'm home as it can be quite dangerous to leave it alone burning. Using it for veggin is a waste, IMHO. It does make a substantial improvement in flowering tho.

i cant add any extra heat right now its too hot in there already.
i may Try that this winter tho.

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Originally Posted by ghost83

i don't really wanna do the whole water sugar yeast thing

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Why not? You could even make wine, genuine root beer, etc. in the process, ahah. :thumbsup: But I'm seriously wondering (in a non-condescending way, I'm truly curious) why you don't want to mess with that method?

from what Im understanding its not that effective. plus in the 4x4 tent i believe i would need a lot of 2 liters

Co2 from a welding supply store make your own delivery system 150.00