Homemade co2 sprayer

Grumpy'

Active Member
Seriously?! Ok your right. I mean after all it's in my house, my room, and shaken and builds pressure Daily when shaken. I'm not going to debate what I see right in front of me.
 

tet1953

Well-Known Member
Ya, actually if you feel like making it into a project you could fill a bowl with baking soda and rig up a vinegar drip system... So it will drip into the bowl of baking soda every couple of minutes.. If you experiment with it you can tune how much vinegar you want to drip out.. Therefore controlling the co2 output :)
I messed around with these homemade methods for a while. Before I decided on other methods, I was working on such a drip system. For the drip I used a medical IV drip line, it worked great.
 
Somebody please correct me if I am wrong but Co2 is really only effective if you can give the plants prolonged exposure at a rate of 1500ppm while the lights are on and a sealed environment. Average natural Co2 in your house is usually around 200-300ppm range. Some where I have read that those small bottle's like that only output average of 500ppm tops so seems to me this method would be a lot of work for little in return. If I were you I would by dri-lock meat packing pads hang a few and spray water on them at random. They would most likely produce more Co2 with less work and 2000 of them for around fifty bucks delivered. These work in the same effect as the currently overpriced green pads that are sold in hydro shops. Also if I was going to apply Co2 manually with a spray bottle just use seltzer water and spray the underside of the foliage. Would really like to know if people think I am wrong about this because I am sure as hell no expert and have no problems with constructive criticism.
 

importedtermite

New Member
CO2 assimilation peaks at about 1000 ppm in C3 plants, which cannabis is. Here is a graph showing an example C3 (and C4) plant's curve of net CO2 assimilation as the concentration increases.


WIN_20160304_20_34_05_Pro.jpg

Rubisco, one of the key molecules involved in photosynthesis, is limited by CO2 intake. So essentially by giving it more the plant can photosynthesize more. However this is up to a certain point, the light receptors can only produce so much of the building blocks necessary for Rubisco, so the plant can't assimilate any higher level. As you can see the orange curve (C3 plants) starts to flatten out as it nears 800 ppm, and will continue to flatten as the concentration of Carbon dioxide increases beyond that.
 

DankaDank

Well-Known Member
Also worth noting is supplementing co2 is only useful when there is more light than the plants can use. Temps and humidity need to be spot on therefore a closed/sealed grow area with a dehumidifier and air con is needed.
 

420producer

Well-Known Member
imma try with the dry ice method. i heard it will kill off any mites as well . but gonna keep the first one in mind , thanks
 

Craigson

Well-Known Member
Also worth noting is supplementing co2 is only useful when there is more light than the plants can use. Temps and humidity need to be spot on therefore a closed/sealed grow area with a dehumidifier and air con is needed.
What about foliar feeding CO2?
Do temps/humidity still matter as much?

I ask because my grow is in an unsealed room in basement and I use a small heater and humidifier to keep temps and humidity UP.
Am I wasting my time by foliar feeding CO2?
Do you continue supplementing CO2 during flowering? I could continue foliar feeding in flower but i will just stop the humidifier to avoid mold etc..?

Any help is appreciated

Note- using 1200w led
 

Yam

Active Member
I have been using this ever since i started my homemade growbox... And i find it works quite well.. Things you will need, spray bottle(anything you can unscrew), baking soda, vinegar, scissors, This is simple.. Unscrew the spray bottle.. With scissors cut the tube that brings up liquid to be sprayed right off.. Add vinegar and baking soda.. Screw the cap on and shake it... Let it sit for a minute and spray the plants with the co2 that the baking soda and vinegar made..( NOT THE LIQUID) I do this up to 3 times a day and it seems to help alot. ;)
Sweet lord thank god...

I read a few DIY co2 methods but none this easy. Bad @as
 

dannyboy602

Well-Known Member
I have a burner. Pushes those ppms up to 1200 for 4 or 5hrs and I run Co2 in veg only. It gets expensive. I got a monitor to measure ppms.
A closed space is a must to be cost conscious.
 

bigrake

Well-Known Member
CO2 assimilation peaks at about 1000 ppm in C3 plants, which cannabis is. Here is a graph showing an example C3 (and C4) plant's curve of net CO2 assimilation as the concentration increases.


View attachment 3623607

Rubisco, one of the key molecules involved in photosynthesis, is limited by CO2 intake. So essentially by giving it more the plant can photosynthesize more. However this is up to a certain point, the light receptors can only produce so much of the building blocks necessary for Rubisco, so the plant can't assimilate any higher level. As you can see the orange curve (C3 plants) starts to flatten out as it nears 800 ppm, and will continue to flatten as the concentration of Carbon dioxide increases beyond that.
So you want to give them 800 ppm not 1500? Thanks
 

Veronavb

Well-Known Member
I have been using this ever since i started my homemade growbox... And i find it works quite well.. Things you will need, spray bottle(anything you can unscrew), baking soda, vinegar, scissors, This is simple.. Unscrew the spray bottle.. With scissors cut the tube that brings up liquid to be sprayed right off.. Add vinegar and baking soda.. Screw the cap on and shake it... Let it sit for a minute and spray the plants with the co2 that the baking soda and vinegar made..( NOT THE LIQUID) I do this up to 3 times a day and it seems to help alot. ;)
Hey i use carbonated water you know the refills and its good too
 
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