This got buried in another thread so started it over here. This is a valid point and could answer a big problem. It really applies to me (it's #3). How much validity is there? I used yeast to make co2 in my grow room.

#1. Plants will use as much CO2 as they are given-- the danger is to the PEOPLE if you use a generator with out a monitor or emergency shut off-- the plants';ll be happy--U B dead!

#2-- the yeast thing does work-- but how much it puts out is iffy... and they only work for a few days before the yeast consume all the sugar then die... you can tell by shaking the jar (or whatever you're using) and if it fizzes-- it's still good... if not- dump it.

#3- you are taking a chance of introducing mold into your grow if it Spurts (often they do) or gets spilled. And yeah-- they smell..

Has anyone else has unexplained mold problems? I had a big problem with mold and was unable to find the source. Cleaned the room. took everything out, spraying with bleach solution, repainting, rehanging lights (after thorough cleaning with bleach also).

You can get the same type of results by doing home-made wine in the growroom (at least 2-3 feet from the plants!) then the plants AND YOU benefit!

something to point out... your yeast population will remain, so when the sugar gets eaten by the yeast, dump out the stale water with yeast left in the bottom, add fresh water and more sugar..
just make sure you dont shake it up before you empty

This is the reason for shaking:

As often as possible shake the container to blend the mixture thoroughly. In one or two days the yeast will grow and co2 will be a by-product in the container. Now, every time you shake it a burst of co2 will be released into the grow room. Also it will continue to be released through the hole in the lid while you are away.

Are those instructions potentially wrong? If you guys think the shaking could be a problem let me know. I will delete from FAQ. Come on guys I need some opinons.

Do you think there is anything to the guys point that the stuff that squirts out of the jug can be a potential mold problem?

no i think the risk factor is low but i use liquid co2 but what doesn't cause mold.

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Abudsmokers_Journal

I prefer my timed co2 tanks and solenoids for easy no mess co2 lol mold is yucky

It's a very old post but I just read it and I must ask something, how can a bottle of yeast producing CO2 can kill you? You must be in a very small room, with lots of bottles of yeast, and a very deep sleeper to actually die from it. Sometimes people overreact very easily...
I'm a molecular biology student and yes, if it spills on your plant, it could populate by eating the sugary content of your plant, but if you have a decent setup you can prevent the risk of spilling anything on your plants. Keeping the bottles of yeast away from the plants and sticking a hose or pipette in them should do the trick.

Replying to another old post, he was talking about using a CO2 generator and the risks associated with that. If you are using the yeast+sugar method, you won't ever have to worry about CO2 poisoning.

You would have though someone would have come up with another cheap method of "creating" Co2 in the grow room.

A lot of people spray carbonated water on their plants. Haven't done it myself, would be interested to know if it actually has any effects on growth.

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go read the diy on co2 bottles with yeast!

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http://www.rollitup.org/hydroponics-...ml#post1255595
What you grow is only as good as what you know!
WANNABE