CO2 via Yeast The Right Way, With Calculations..

i love a good heavy narcotic ringing in the ears caused by sleep deprivation and heavy bong rips... brings me right back. YOU GUYS FEEL ME,right??? ....

thanks for the calcs and info born2, i have some follow up question s, if you could-

i have just started a medical grow, and have constructed a sealed enviro, for all intents we'll call it 500 ft3. after just booting up and running for goin on 48 hours, it is evident i will need co2 enrichment. i have exhausted all of my funds on the basics, and need to do it on a shoestring.

1: when running fermentation you have indicated X volume of co2 over several days, which would work in a vented enviro, but as i do not plan on venting, and i would estimate my room as 99% sealed. how would you go about metering co2 release, to achieve real world coditions (it always looks better on paper), so as to use larger batch size, and not dealing with a bunch of 2L bottles?; or this reaction meters itself based on sugar(?) amounts, and how would you calculate this?

2: i have access to propane and a valve and piece of pipe(bunsen), but would have no way to measure ppm(regardless of generation technique). i have looked at meters and they are out of my price range at this moment, and was wondering if there was some technique of measuring actual ppm, or if these meters were available to another industry cheaply. i have seen the 20 dollar one time use tests, and was wondering on the reliability of the measurements/stability of system, if i wasn't losing much i probably wouldn't need to measure every day, unless the plants use considerably more as the grow(exponentially even?)100 ppm per day seems to be the only figure given to this.

i flower 8 6 feet tall plants in this space

i want to know details about using propane tanks... like what exactly is the steps or the use of it for? i know it produces a lot of co2 but do you have to lite up the gas or just let the gas leak out and stay in the room... sorry if my question sounds stupid but im obviously not tooo scientificly edjumacated.. and let me also add, i cant get my hands on a meter or any high tech gadgets because i live in egypt... but i will hopefuly understand what you are talking about because i was born and raised and completed high school in richmond va for 22 years and i just recently moved here and decided i need my own mary jane supply and i and kinda wingin everything.. but i do have feminized seeds that i want to grow the right way and fast.. i use peat moss and manure mix for soil.. and have a N def problem.. because i have yellow turning leaves... starting from bottom...

is there such thing as too much co2 i want to make this mix but would it be overkill for 2 medium sized plants in a scrog?

Not if you use a gallon container. Someone did a test with 10L I beleive and it barely held 1500ppm for a few days. You probably want more than a gallon of solution.

cool, so im guessing 3 gallons would be good for my grow. temps get up to 100 degrees. can there ever me too much oxygen ?

i want to make sure they have co2 at all times so they dont die

Any suggestions on propane use??

Rasta,

Here is a link to an experiment being conducted by DesertRat on CO2 production effectiveness. It's a good read...

Myth Busters Real Truth About CO2

thanks bro! i have read most of it and im getting preety confident using this method now.

So what does it mean when you have to keep shaking the bottle to get the gases to build up?
I used a tablespoon of yeast to 1 cup sugar and 1 tbsp molasses. Within a couple hours the bottle really started to expand, but after several hours I would have to shake it up to get any real release. Thinking I might have added too much yeast possibly?

Great info on this thread and the others that I read.... Here's the set up I built. 3L jug from Rite Aid was like $4, Drilled 1/4" holes in the plastic then put tape over them to act as a gasket, then drilled the tape. Inserted 1/4" tubing through the tape and then ran them directly to the plants.
I used 2 cups of sugar, 1 can of tomato paste, 1 tablespoon of yeast and 3Litres of water.

How long does on of those last would u say?

Mine is lasting about 3 days.

J

It´s an interesting study, but way too technical to be practical.
I tried the experiment with cereal, because you said the yeast need food, well I left the room for a couple of hours, and when I returned I found a cereal explosion. I fed the yeast Corn Flakes, like a handful, and spent a few hours cleaning the floor, the wall, the light bulb, the reflector and all of the nearby plants.

If anyone wants to try this, visit this thread

https://www.rollitup.org/do-yourself/1362-home-made-co2-tutorial.html

I find it works better when I don´t feed the yeast, you have to add sugar every 5-7 days, and that´s better than cleaning up explosions of gunk, I´m glad I didn´t use the tomato paste.

It seems born2killspam started this thread to show a way to make co2 and use it's byproduct in the making of fermented spirits waste not want not they say. I love to make bread so it stands to reason that making a recipe for a sourdough starter for the making of sourdough bread would also work just as well. I don't think explosions of food are involved. lol

Obviously an old thread but can i get some advice on a setup for a 2x8x6 closet grow?

i just read this, and i always like to understand the idea and check the numbers, so thank you for having them right there in the post. this is so helpful and i cant believe i almost gave my babies some half ass sugar-water concoction. you really just put it to shame. nice job on applying chemistry to the everyday btw.

I need to use Co2 in my 2x3x5 tent but if I go the sugar/yeast route it will attract pests. Is there an easy DIY way of having Co2 releasing into my tent another way?

It is only a small grow (3 plants) so don't need an industrial solution.

A tank or burner..