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rmcc-luke
very nice post!
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The how to and why fors of CO2 supplementation for growers
- Thread starter Lazyman
- Start date
cheapo, diy pyranometer meter (from other incarnations):
This is a gold mine of cannabis growing laboratory research
https://www.icmag.com/ic/showpost.php?p=2469835&postcount=7
hope this helps. enjoy your garden!
Cannalicious
Member
I've seen multiple sources stating what you said. Ed Rosenthal. The back of a CO2 controller box that had a timer that turns off the CO2 at night "because CO2 is not used at night".
I would really like to see those research paper on it, because that is not how I learned it in my college botany class in the eighties.
Photosynthesis is divided into two "reactions:" the light cycle and the dark cycle: photophosphoryation and the calvin-benson cycle. It is now known as the light cycle (because it requires light) and the light independent cycle (still the calvin-benson cycle) because it works in the light or the dark.
That's what I learned 20+ years ago. I understand that scientific "facts" often change. Can you enlighten me?
Thanks,
-L
G
grow nerd
I don't know about the entire length, seems to knock it down at least a couple of days, but what's really noticeable IME is the onset of flowers and how much more quickly they develop. IMO the biggest visible changes are from weeks 1-3.
G
grow nerd
I can't tell you much about the technical stuff on that, 'cuz I don't know it... but from what I understand CO2 is used for photosynthesis during light (CO2 + Mg + light, or some variation thereof?).
Sure, a few pages down on this page http://www.scribd.com/doc/15934135/Greenhouses-Carbon-Dioxide-in-Greenhouses
basically says because CO2 isn't used at night because no photosynthesis is occurring. It's funny, on Google this thread comes up in the first few results now on anything grow and CO2 related.
basically says because CO2 isn't used at night because no photosynthesis is occurring. It's funny, on Google this thread comes up in the first few results now on anything grow and CO2 related.
G
grow nerd
Really wish I could do side-by-side's and such more easily, like CO2 vs. no CO2, to see exactly what effect it has. For me running CO2 enrichment for increased production is only part of the reason, or rather a (huge plus) by-product of running a sealed & temperature/humidity-controllable environment. Not the other way around, kinda a chicken & egg ("which came first?") deal, though, I think 
... I mean it's really been a part of progressive upgrades through my career, and didn't have much desire to "get back to the basics". So I can't really say it does exactly this, or exactly that; hard to quantify at this point w/o doing side-by-side, is I guess what I'm trying to say. Just a big blurrrr.
... I mean it's really been a part of progressive upgrades through my career, and didn't have much desire to "get back to the basics". So I can't really say it does exactly this, or exactly that; hard to quantify at this point w/o doing side-by-side, is I guess what I'm trying to say. Just a big blurrrr.
Cannalicious
Member
Dear Lazyman,
I sure am trying to get this right, but maybe my efforts (and money) are being wasted.
I am blooming in a partially unfinished laundry room in the basement in a poorly built house.
It has a concrete floor, and I was able to drywall the room. I have an AC in the window well, and am cooling my lights with fresh air being pulled through the dryer duct through my lights and vented into the rest of the basement. This is relatively air tight.
My temperature is about 85-90 degrees.
My problem is that the room has no ceiling. The room was designed to be 8 ft tall. There is about 2 feet of dead space above this full of god knows what - random rafters (if it were a roof I guess), water pipes, and electrical, phone, and tv cables. Let's say a water pipe is 2 inches in diameter, the hole that goes into the subfloor is about 4 inches in diameter.
There are also random cracks and holes up there.
I do not have the skills nor the money to put in a ceiling, and I cannot physically fit into many of the spaces that I would have to reach to stuff the holes with insulation.
I am hoping that the CO2 is heavy enough to stay in the room and the plants are benefiting, but I have no idea. I am concerned that the temp is too high for the plants if the CO2 is wasted.
Do you have any suggestions for me?
Thanks,
-L
I sure am trying to get this right, but maybe my efforts (and money) are being wasted.
I am blooming in a partially unfinished laundry room in the basement in a poorly built house.
It has a concrete floor, and I was able to drywall the room. I have an AC in the window well, and am cooling my lights with fresh air being pulled through the dryer duct through my lights and vented into the rest of the basement. This is relatively air tight.
My temperature is about 85-90 degrees.
My problem is that the room has no ceiling. The room was designed to be 8 ft tall. There is about 2 feet of dead space above this full of god knows what - random rafters (if it were a roof I guess), water pipes, and electrical, phone, and tv cables. Let's say a water pipe is 2 inches in diameter, the hole that goes into the subfloor is about 4 inches in diameter.
There are also random cracks and holes up there.
I do not have the skills nor the money to put in a ceiling, and I cannot physically fit into many of the spaces that I would have to reach to stuff the holes with insulation.
I am hoping that the CO2 is heavy enough to stay in the room and the plants are benefiting, but I have no idea. I am concerned that the temp is too high for the plants if the CO2 is wasted.
Do you have any suggestions for me?
Thanks,
-L
Cannalicious
Member
I snapped a couple of pictures:
Hmm interesting. CO2 depends a bit on how it was dispersed. Hot CO2 from a gas-fired generator will cdertainly rise, but cold CO2 dumped from a tank will sink. Fans keep the whole thing mixed up though, or at least they should!
I had an unfinished ceiling in my basement as well, I covered the whole thing with sheets of Tekfoil insulation from Farmtek.com. Staples up easy and is flexible, tape the seams and joints with foil tape and you can make a pretty airtight pouch. It even comes with mylar on one side and white poly plastic on the other,m with two layers of bubble wrap inbetween. If that's not feasible I would at least see if you can borrow a CO2 setup from a friend for a day and run it, and see how fast it depletes or leaks. I tried it on my old grow and it leaked out faster than I could generate it! Good luck!
I had an unfinished ceiling in my basement as well, I covered the whole thing with sheets of Tekfoil insulation from Farmtek.com. Staples up easy and is flexible, tape the seams and joints with foil tape and you can make a pretty airtight pouch. It even comes with mylar on one side and white poly plastic on the other,m with two layers of bubble wrap inbetween. If that's not feasible I would at least see if you can borrow a CO2 setup from a friend for a day and run it, and see how fast it depletes or leaks. I tried it on my old grow and it leaked out faster than I could generate it! Good luck!
Vincent Vega
Member
Looks like you have a drop (t-bar) ceiling minus the ceiling tiles. Would just 2x poly the whole thing. I would try using butyl tape or some other kind of adhesive to try and stick the poly to the t-bar.
Meen Green
New member
https://www.icmag.com/ic/showthread.php?t=57752
This is working perfect. My water bill has risen about $25, but I don't lift a finger, my temps are at 80-85 and my Humidity is 30-40. Still trying to figure out how many PPMs of nutes they can handle with 1000w HPS'.
This is working perfect. My water bill has risen about $25, but I don't lift a finger, my temps are at 80-85 and my Humidity is 30-40. Still trying to figure out how many PPMs of nutes they can handle with 1000w HPS'.
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puma
good reading but i need 1answer do you use CO2 in dark cycle or lights on..
thank you
thank you
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puma
thank you lazyman..
