co2 empty

[newbplantgrower420]

do co2 20lb or 50lb tanks give off ethylene too? i thought only burners gave off ethylene.

 

[DoubleAtotheRON]

do co2 20lb or 50lb tanks give off ethylene too? i thought only burners gave off ethylene.

Co2 tanks do not produce ethylene... its a byproduct of burning fossil fuels like propane, or natural gas. It's also produced my ripening fruits, but Im not sure if cannabis produces that much... if any?.. not sure.

 

[newbplantgrower420]

Co2 tanks do not produce ethylene... its a byproduct of burning fossil fuels like propane, or natural gas.

gotcha ty. do you run a completely sealed room with co2? or do you vent out at nights?

im wondering cause im fully sealed and my co2 ppms get up to 2400 at nights during late flower. im thinking of venting out at nights with a carbon filter blowing air out from the room just to get rid of all that excess co2.... also having humidity problems in late flower.

idk if all that excess co2 is good for the plants honestly. its nice to reuse it the next lights on cycle.... i swap tanks less often. but 2400 co2 ppm at late flower is insane

 

[DoubleAtotheRON]

gotcha ty. do you run a completely sealed room with co2? or do you vent out at nights?

im wondering cause im fully sealed and my co2 ppms get up to 2400 at nights during late flower. im thinking of venting out at nights with a carbon filter blowing air out from the room just to get rid of all that excess co2.... also having humidity problems in late flower.

Yes, completely sealed. How are you getting up to 2400ppm at lights off? Are you running CO2 during lights off? I have a Spartan controller that has a photocell to detect lights on or off and it won't kick in during lights off. Once the lights kick off, the genny kicks off as well till lights on again. If I have a reading of 1400ppm when the lights shut off, the ppm's will fall for the next 12 hours to around 450ppm till lights come back on. I do not vent. I guess they eat it up shortly after lights out. Room is air tight. If you are burning or running CO2 during lights off, you're wasting it. They don't process CO2 during lights off... and if you are, then that could be part of your RH prob. You running a tank or genny? Nevermind.. I see you're running tanks... but are you running at lights off?

 

[newbplantgrower420]

Yes, completely sealed. How are you getting up to 2400ppm at lights off? Are you running CO2 during lights off? I have a Spartan controller that has a photocell to detect lights on or off and it won't kick in during lights off. Once the lights kick off, the genny kicks off as well till lights on again. If I have a reading of 1400ppm when the lights shut off, the ppm's will fall for the next 12 hours to around 450ppm till lights come back on. I do not vent. I guess they eat it up shortly after lights out. Room is air tight. If you are burning or running CO2 during lights off, you're wasting it. They don't process CO2 during lights off... and if you are, then that could be part of your RH prob. You running a tank or genny?

ya i got a titan co2 controller with a photocell too. same as you. lights off it turns off too. im going to check if the regulator is leaking tomorrow at nights.

im used to it going up a few hundred ppms at nights but going from 1200 to 2400 is insane.

you actually lose co2 ppm at nights? plants are giving off co2 while they respire at nights so im curious how you lose ppms at nights.

 

[DoubleAtotheRON]

ya i got a titan co2 controller with a photocell too. same as you. lights off it turns off too. im going to check if the regulator is leaking tomorrow at nights.

im used to it going up a few hundred ppms at nights but going from 1200 to 2400 is insane.

you actually lose co2 ppm at nights? plants are giving off co2 while they respire at nights so im curious how you lose ppms at nights.

They do give off Co2 at night, but at a rate of about half of what they absorb. So, if you're feeding in at 1400 during lights on, it would make sense that the CO2 released at night would drop. You must have a leak or something. There is no reason that your ppm's would double during lights off. If that were the case, then your controller would not kick in at lights on if you have it set correctly.

 

[newbplantgrower420]

They do give off Co2 at night, but at a rate of about half of what they absorb. So, if you're feeding in at 1400 during lights on, it would make sense that the CO2 released at night would drop.

oh i see... its about half of what they absorb.

I leave it at 1200ppm maximum on the controller..... so lights turn off....photocell turns off... it ends at ~1200ppm right? then lets say....after 8-9 hrs theyve been giving off half rate co2 of what theyve absorbed. i should be.... give or take.... only a few hundred ppms upwards of 1200 right? not 2400.

 

[DoubleAtotheRON]

oh i see... its about half of what they absorb.

I leave it at 1200ppm maximum on the controller..... so lights turn off....photocell turns off... it ends at ~1200ppm right? then lets say....after 8-9 hrs theyve been giving off half rate co2 of what theyve absorbed. i should be.... give or take.... only a few hundred ppms upwards of 1200 right? not 2400.

No.. it should be closer to regular atmospheric CO2 after 12 hours.. feeding in at 1200, lights go out, CO2 goes off... they eat up some of the CO2 as the heat comes down.. then they will release about half of what they absorbed. So like 600ppm minus what they ate up right after lights out. I see no reason that it would go up during lights out. This is just my experience with a burner, and controller in a sealed 20x30 room.

 

[newbplantgrower420]

No.. it should be closer to regular atmospheric CO2 after 12 hours.. feeding in at 1200, lights go out, CO2 goes off... they eat up some of the CO2 as the heat comes down.. then they will release about half of what they absorbed. So like 600ppm minus what they ate up right after lights out. I see no reason that it would go up during lights out. This is just my experience with a burner, and controller in a sealed 20x30 room.

makes sense. i got a similar setup 20x20, fully sealed with co2 photocell controller. i just swap tanks instead of a burner. got like ~90 plants.

only thing i can think of is regulator is leaking at night raising it. what do you think is going on?

Ive had this problem once before like over a yr ago... i just forgot how it went away or if i did something different before.

 

[Renfro]

only thing i can think of is regulator is leaking at night raising it. what do you think is going on?

Plants will actually put out CO2 during the dark period. So it's not uncommon to see elevated CO2 PPM at lights on if you have a sealed room and are not venting during the dark period.

 

[DoubleAtotheRON]

makes sense. i got a similar setup 20x20, fully sealed with co2 photocell controller. i just swap tanks instead of a burner. got like ~90 plants.

only thing i can think of is regulator is leaking at night raising it. what do you think is going on?

Ive had this problem once before like over a yr ago... i just forgot how it went away or if i did something different before.

No idea... I would first check for leaks on the tank/regulator. Think about it.. if you were starting your cycle with 2400ppm, your tank would not release for a good long while after lights on if you have it set at 1200.

 

[DoubleAtotheRON]

Plants will actually put out CO2 during the dark period. So it's not uncommon to see elevated CO2 PPM at lights on if you have a sealed room and are not venting during the dark period.

Ok.. here's the man folks.. I knew he'd jump in. So why do you think my CO2 is dropping at lights out, and his is doubling?... and I dont think it would matter if he's on a tank, and Im on a genny.

 

[DoubleAtotheRON]

@Renfro ... just thought about this. Do you think the AirROS is cleaning up my CO2 at lights off?

 

[Renfro]

So why do you think my CO2 is dropping at lights out, and his is doubling?

Your case is the exception to my experience. I really can't figure any reason for the CO2 PPM to drop during lights out, other than some form of air exchange but you say it's sealed up tight. I used to run some really tightly sealed rooms back in Missouri, panda filmed and white duct taped up tightly for odor containment and make sure there is no possibility of a light leak. I always had CO2 levels rise when the lights are off.

Do you think the AirROS is cleaning up my CO2 at lights off?

If you don't run the AirROS after lights out does the CO2 PPM drop? Seems like a simple test that wouldn't take too long?

I recall Michael saying the AirROS won't mess with CO2 enrichment, he did mention that it will destroy ethylene gas, so I don't think it's "cleaning up" the CO2. How fast does the CO2 level drop after lights out?

In his case with the dark period CO2 levels going up to 2400, in a sealed room, I would say that's actually on the very high side of normal indicating vigorous growth, unless there is a leak on the tank/regulator. Is the room full of a bumper crop when the CO2 levels are going up? A simple test would be to just close the tank valve at lights out and see what happens overnite with the CO2 PPM and open the tank valve at lights on. If it is the plants putting out that much CO2 at night, it might even be prudent to provide a timed air exchange during the dark period to keep the oxygen levels up as the plants need that during the dark period, maybe another before or at lights on if the levels are still above 2000, just to get the levels down to 1200 - 1500 PPM for lights on. I wonder what the reading inside the structure but outside of the grow room, are we talking residential with occupants breathing CO2? Are there any appliances like a gas furnace for the rest of the structure involved? If so make sure the vent isn't plugged lol.

and I dont think it would matter if he's on a tank, and Im on a genny.

Agreed.

Those autopilot co2 loggers are about $100 and they are very handy, you can see how fast your levels are changing, like does all the CO2 get used up after lights out or does it happen gradually overnight? I learned that my home typically has CO2 levels that are considered high, if we are running the gas stove and making a big feast I like to open a window because I have observed PPM numbers that were rather excessive lol. Three rotties, my girlfriend and myself plus the oven cooking food and stove top burners fired up cooking I have seen levels well above 3000 in my living area. The autopilot logger is a little less accurate above 3000 PPM if I remember correctly... Many factors lol. Those loggers, there is a model that takes the memory card and one that doesn't, so if you want to pull the numbers into Excel you want the one thats just a little more $ APCEMDL still affordable at the current price of $127. Back when I bought my APCEM2 (no memory card) the APCEMDL was almost $60 more than the APCEM2. I do wish I had the memory card ports because it would be cool to import the data into excel sometimes but I can still do what I need to do with the LCD screen.

 

[newbplantgrower420]

Plants will actually put out CO2 during the dark period. So it's not uncommon to see elevated CO2 PPM at lights on if you have a sealed room and are not venting during the dark period.

going to check for regulator leaks when lights turn off today.

i got one question though i was thinking.

if i scrap the sealed room and run a large carbon filter hooked up to a humidity/environmental controller set to ~50% to vent out humidity at nights. no dehumids needed anymore

does the carbon filter actually push out all the co2 air with it? also the air im pushing out through the carbon filter to my street .... it wouldnt reek of weed right because its going through the carbon filter... itd just be non smelly air?

 

[DoubleAtotheRON]

Your case is the exception to my experience. I really can't figure any reason for the CO2 PPM to drop during lights out, other than some form of air exchange but you say it's sealed up tight. I used to run some really tightly sealed rooms back in Missouri, panda filmed and white duct taped up tightly for odor containment and make sure there is no possibility of a light leak. I always had CO2 levels rise when the lights are off.


If you don't run the AirROS after lights out does the CO2 PPM drop? Seems like a simple test that wouldn't take too long?

I recall Michael saying the AirROS won't mess with CO2 enrichment, he did mention that it will destroy ethylene gas, so I don't think it's "cleaning up" the CO2. How fast does the CO2 level drop after lights out?

In his case with the dark period CO2 levels going up to 2400, in a sealed room, I would say that's actually on the very high side of normal indicating vigorous growth, unless there is a leak on the tank/regulator. Is the room full of a bumper crop when the CO2 levels are going up? A simple test would be to just close the tank valve at lights out and see what happens overnite with the CO2 PPM and open the tank valve at lights on. If it is the plants putting out that much CO2 at night, it might even be prudent to provide a timed air exchange during the dark period to keep the oxygen levels up as the plants need that during the dark period, maybe another before or at lights on if the levels are still above 2000, just to get the levels down to 1200 - 1500 PPM for lights on. I wonder what the reading inside the structure but outside of the grow room, are we talking residential with occupants breathing CO2? Are there any appliances like a gas furnace for the rest of the structure involved? If so make sure the vent isn't plugged lol.

Agreed.

Those autopilot co2 loggers are about $100 and they are very handy, you can see how fast your levels are changing, like does all the CO2 get used up after lights out or does it happen gradually overnight? I learned that my home typically has CO2 levels that are considered high, if we are running the gas stove and making a big feast I like to open a window because I have observed PPM numbers that were rather excessive lol. Three rotties, my girlfriend and myself plus the oven cooking food and stove top burners fired up cooking I have seen levels well above 3000 in my living area. The autopilot logger is a little less accurate above 3000 PPM if I remember correctly... Many factors lol. Those loggers, there is a model that takes the memory card and one that doesn't, so if you want to pull the numbers into Excel you want the one thats just a little more $ APCEMDL still affordable at the current price of $127. Back when I bought my APCEM2 (no memory card) the APCEMDL was almost $60 more than the APCEM2. I do wish I had the memory card ports because it would be cool to import the data into excel sometimes but I can still do what I need to do with the LCD screen.

From what I can tell, it’s a gradual drop as the night cycle goes along. I’ll kill the AirROS tonight, and see what happens.

 

[Lordhooha]

Im running a sealed room 20x30 at anywhere between 1000-1400ppm, and have ran through approx 100 gallons in 6 months. Hard piped from a 500 gallon tank to an Ares 8 burner on propane. I think this is the most efficient way to use CO2 from what I have researched. But yeah.. you gotta be sealed up tighter than a frogs ass. (You see what I did there @Flatrate)

I just dropped a 500 lbs pig at my other grow to fuel four 10 burners these rooms are 30x12

 

[Crazy_Ace420]

I use Co2 bags..., yeah they are extra shit to throw ABOVE your plants but i use them. I've done an ass ton of research on them and yes they work. One 5lb bag will last me half a year to a year. A lot of ppl hate on them, and to them i say , to each their own... Have fun with co2 bottles!

 

[zem]

I use Co2 bags..., yeah they are extra shit to throw ABOVE your plants but i use them. I've done an ass ton of research on them and yes they work. One 5lb bag will last me half a year to a year. A lot of ppl hate on them, and to them i say , to each their own... Have fun with co2 bottles! View attachment 4757490

Lol I do not hate them, I just think that they are as effective as placing a good luck hand on a wall

 

[Crazy_Ace420]

Lol I do not hate them, I just think that they are as effective as placing a good luck hand on a wall

Hey now! Lol . shit works! I've seen co2 readers and equipment measure co2 levels, and they are definitely elevated above normal . .. And its not just from me talking to my plants!!