CO2 Benifits.

Carbon dioxide levels can increase growth speed a great deal, it can even double it. The plant uses CO2 for photosynthesis to create sugars it uses to build plant tissues. CO2 level will increase the plants ability to manufacture these sugars and plant growth rate is enhanced considerably.

CO2 is most usable for flowering, but can be used during veg as well.

You can buy or lease cylinders from local welding supply houses. If asked, you can say you have an old mig welder at home and need to patch something up.

For a small closet, one tank could last 2 months, but it depends on how much is released, how often the room is vented, hours of light cycle, room leaks. This method may be overkill for your small closet.

It is good to have a small constant flow of CO2 over the plants at all times the lights are on, dispersing directly over the plants during the time exhaust fans are off. When the light is off you don't need CO2. When the fan is on for venting, CO2 should be shut off.

 

baking soda and vinegar = co2

 

I used to dissolve a shit load of sugar in a barrel of water and chuck in some yiest. this used to bubble away at a slow constant rate. basically it's making wine without the favouring.

an easy way to do it is buy an old fire extinguisher off eBay for about £15, attach a ball valve and a hose. run the hose above your plants as co2 is heavier than air and open the ball valve just slightly until you hear a quiet hiss. re filling a 2 kg extinguisher will be about £5.

 

Amazon.com: EZ CO2 Cultivator: Home & Kitchen

one of them in a 3x3' tent does the job lovely.

 

that's just a bag of yeast. it would be a hell of a lot cheaper to buy a water container, a hose, some suger and some bakers or brewers yeast

 

Q- What is inside the ExHale Cultivator?
A- Inside the ExHale cultivator is a non-fruiting
mycelial mass that is growing on organic matter.
NO manure is used and there is no odor

Where did you get that info? ^^^ is the closest thing I could find to an explantation as to what is actually in the Exhale bag from the Exhale site. About | ExHale CO2 I'm not so certain it only contains yeast or any at all.

 

Let's say you sleep in the room with the plants. I don't really think aditional CO2 is needed. A normal house has about 800ppm and a room where someone has slept in and is habitated(lived in?! i hate this word) has ppm of about 1200. Just keep the door closed and open the windows less. The fermentation thing is fine too. You can calculate how much co2 it gives off from this formula C6H12O6 + Zymase → 2C2H5OH + 2CO2. For every mole of sugar (molar mass of 180g per mole) you get 2 moles of CO2.
I don't find this very efficient because the process is not 100% efficient. At some percentage of alcohol the yeast dies off(let's say at 50% alcohol the yeast dies, that means you only get 50% efficiency, compared to ~100% from dry ice)

Breathing in the same room:
Ideal situation. You breath in air with 0.039% co2 by volume. You breath out air with 5% co2 by volume. The average air exchange is about 500ml per breath, 15 breaths per minute. That is 7.5 liters or air exchanged in one minute with 5%co2 = 375 ml of co2 PER MINUTE. To get to those 22.4 liters of co2 (1 mole, right?) you only need an hour (59.something acording to my phone). This is the ideal situation.
In real life. A room is not perfectly sealed. CO2 is heavier than air so it sinks to the floor. The door is not a tight seal so CO2 leaks (it flows out like water from a punctured container) out underneath the door.
Conclusion. I'd say you don't need CO2 addition if you stay in the same room or if you grow them in your basement(co2 sinks, right?).

physics, they rule, man!

 

pmsl!! yes, like I said, yeast growing on sugar.
probably has a starchy product to bulk it out

 

that formula cannot predict the amount of co2 produced there are other factors involved, mainly temperature.

your assumption that alcohol will kill yeast at 50% is way off. more like around 16%

I have made my own wine for many years and know fermentation pretty well.

if you want to measure the amount of co2 produced just install an air lock. standard practice when making wine to stop contaminants entering the wine

breathing out co2 would only make a difference if the room was sealed up. and I mean airtight. any normal room will be full of ways for CO2 to disperse.

I think adding co2 will only make big differences if you have everything else spot on but the cost is so low, why not give it a go?

 

oooo wine... yay, bro.

 

grow shrooms next to your plants!

 

People claim how expensive a CO2 set up is...the associated gear to trickle it in is. The actual CO2 tank is under 100 and very cheap to refill. Once you get the tank its like propane for a grill you keep it.

The associated gear is used alot in horticulture as well and you can find good deals for it on Ebay usually.

CO2 is easy and hard. Basically your just trying to get to a certain PPM of CO2 in your grow area. Its hard because you need to have your area somewhat air tight and cant be venting while its running.

Your light has a impact as well. A cool tube would be good but not everyone can do it. I have a 800w LED Panel. Theres a guy on here with the same and he uses CO2. Well we cant run our light without venting so he built a manifold so he could run his LED by isolating the heat it pumps out which is through forced air through its giant heat sink.

Good example of it being easy but hard.

If your just releasing CO2 and your fan is on high and doing it in a open area well it all dissipates rapidly into your environment. You might think your doing something but odds are your CO2 levels are not much higher then normal levels.

Also the gear associated with it is mainly metering and dispersal gear. You can set the PPM of CO2 with it basically regulate it.

 

^Great post, that man knows how to educate. Not pontificate.