Hick said:
I agree 100%. This is a very poor method of Co2 induction. In order to benefit from Co2, you must be able to totally control ppm, air circulation/venting, temperatures, ect.
Yeast and sugar just makes a mess and stinks.. IMO.
Well, I agree with what you're saying totally, but I would just like to add that I still think it's
possible for the sugar and yeast method to be beneficial without having the rest of your i's dotted and t's crossed. For instance, I started my veg by adding a 5 gallon bucket filled with sugar water and yeast on a piece of toast, and even though I majorly overfed my babies and subjected them to high temps for 7 weeks of flowering, they're still mighty big and healthy. Of course, I can't at all say what is responsible for what, but that wouldn't lead me to conclude that using the sugar water and yeast method for increasing CO2 isn't something that would be worthwhile to experiment with even if you don't have the most scientific grow setup. Also, there is no smell or mess. It's actually quite simply to set up, and once it's set up, it requires absolutely no attention. So besides the price of the sugar and the packet of yeast, it's a pretty no lose situation.
BTW, these are the instructions I went by when putting together my CO2 setup. They are one of many docs I downloaded a while back, in a pack called "Complete Canabis Grow Library". So nice info, there.
Stickydanks basic CO2 method
* 10lb. white sugar
* 5 gallon clean bucket W/lid
* 4 1/2 gallons of water
* A piece of toast browned and hard
* A table spoon of dry active yeast (for baking bread)
First boil the water, (this will ensure clean water) remove from the heat and add the sugar. Stir until sugar dissolves. Let cool until water is room temperature (if you don't let it cool down it won't work). After the sugar water has cooled, float the piece of toast on top of the water. Now, empty the tablespoon of yeast over the toast. After a few days, the yeast will take over the toast and start making bubbles (CO2) in the bucket. After a week, the amount of bubbling (CO2) will increase. Keep the lid airtight on the bucket. CO2 travels up the dispersion tubing, and due to it being heavier than air, falls directly onto your plants. Timing your exhaust, is essential in maintaining an effective level of CO2. Editors Note: Unfortunately the author of this contribution has not been able to test the CO2 levels produced using his method. Personally, I would use a CO2 analysis kit to help manage (exhaust timing etc), and maintain, an optimum level of around 1500PPM.
edit: although, after typing all that, I went and opened up my sugar and water bucket for the first time in months, and this is what I saw, so who knows how long I've been getting results out of that bucket. lol
But maybe just with my plants seeing it there, there was a placebo effect and they kept growing as if there was more CO2 in the room than there actually was.
:ignore:
Though I can say that it was still bubbling a couple months after I first set it up, before I sealed it, so it does have a decent amount of life to it.
Aurora_Indicas_Dad said:
what brand of carbonated water are you guys using as a foliar spray?
I use "Big K Sparkling Water" from Krogers. Just make sure when you look at the side panel that you see this.