co2 in entire room 24/7?

[Sinisterzane]

Hi all,

I am doing a build and have 2 x 3m x 2m tents in a sealed basement room. Of which one tent will be veging and the other will be flowering. In each tent I have a 12" airforce fan and 12" phat filter, also in each tent I have an 8" inlet fan. One tent will have a 1KW halide vert and the other 2 x 1kw halide verts, 4 x 600W dual spectrums in the tent with 2 x 1KW verts and 6 x 600W dual spectrums in the tent with the 1 kw vert.

The air will be pulling from the tents through the carbon filters into the main sealed room, pushing into the tents from the main sealed room and there is a big humidifier in there plus 2 x split air conditioning units (one alone wasnt powerfull enough to deal with the heat so I have put another one in)

One of the tents is using a big 4 way undercurrent system and the other tent has a 20 bucket RDWC in it

The question is where do I put the co2 in? I am thinking of using big bottles and gasing the main space at 1500 - 1800ppm and monitoring it using a ppm meter

If I gas the main space this would mean the intake fans would pull in the co2 enriched air into the tents and the carbon filters would be pulling it back out (everything goes back intio the sealed room) and the big humidifier should keep the humidity at around 70%...so basically everything is constantly recirculating

Because one tent is 18/6 and the other is 12/12 it is going to be very hard to make the co2 stop working when the lights are off...as I understand it they produce co2 when the lights are off so apart from using more co2 than is necesary is there a problem with the air constantly being at around 1500-1800 ppm all the time even when the lights are off?

I am using Advanced nutes for the undercurrent and cannas on the RDWC

I am looking to get a gram a watt........I know the strain well (Armageddon) its just making sure I get it set up right and dialed in properly

Thanks

 

[Avinash.miles]

ur wasting co2 when lites are out, u kno that tho rite? plants use co2 primarily during photosynthesis which only happens when lites are on... so.... dont waste too much.

co 2 is heavier than air, so make sure ur co2 comes in mid of the room, drops onto plants, and ur exhausts must be at the top to pull hot air out and not pull all ur co2 directly out before it can be used by plants.
the idea is the co2 drops in and is used by the plants over time, so u can not put co2 in one tent, then pull it out of that tent and use it on the next one.

id put 2 lines coming from one tank, one line into each flowering room.
or use 2 tanks one for each room

 

[CasioCalculator]

Higher CO2 at night may actually hinder your plants according to spurr's thread that links some scientific study. He suggests using <500 PPM during the night and no more than ~1150 PPM during the day.

Source: http://www.icmag.com/ic/showthread.php?t=221893&highlight=night

 

[Sinisterzane]

so if the whole room is at a fixed ppm do you think its necesary to have the co2 going directly into each tent? The basement has the 2 x 3m x 2m tents in and about 1.5 x 3m open space of which is where I am planning on putting the co2 (everything will be at the same ppm)

as for getting the co2 to turn off when the lights go out its kind of tricky as one tent is in veg and the other is in flower..

 

[growshopfrank]

so if the whole room is at a fixed ppm do you think its necesary to have the co2 going directly into each tent? The basement has the 2 x 3m x 2m tents in and about 1.5 x 3m open space of which is where I am planning on putting the co2 (everything will be at the same ppm)

as for getting the co2 to turn off when the lights go out its kind of tricky as one tent is in veg and the other is in flower..

if you have to be simple and cheap i would use the co2 only while the flowering lights are on with both veg and flowing lights starting at the same time

 

[Avinash.miles]

i see u wanna put co2 into the basement and let the fans pull it into the rooms (tents) eh?
not ideal,
most ideal is co2 comes straight from tank into tubes and dumped right onto plants.
my guess is its gon b hard to maintain ppms in tents if co2 is getting dumped outside the tents, if u do this be sure ur intakes are low to the floor and ur basement is airtight so co2 isnt creeping out someplace,
good luck
pics may help clarify

 

[Cali MedPatient]

I agree with A.M. Seems like an inefficient way to add co2. If the outer room is big, I would think you're gonna rip through bottles trying to keep the whole room full of co2. When I built my first sealed room I kept the ppm at 1500 (too high, I know that now) and when the lights went off, the ppm would go up over 2000, and higher since the meter only read up to 2000. My plants did not like it. They very droopy and stressed. So I added an exhaust fan with a damper that closes when the fan is off. Problem went away. Now I keep it at 1000 ppm, but I still run that fan at night. So be wary of over co2-ing during lights off. Try to get some fresh air in there when the lights go off. And I would add co2 only when the flower room lights are on, that way the veg will get co2 for 12 of the 18 hours the lights are on, which is better than none. Most people I know who use co2 don't even use it in a veg room.

 

[Prairie Boy]

I run 1500 ppm @ 85 degrees and vent only @ lights out.i don't run over 550 for the couple weeks of stretch and when flushing.I don't enritch the veg room,just vent.You will be suprized how co2 will escape,so sealed means sealed.I'm no pro,but there lots on here who have written lots of good info.It will take a while to dial in,when you do you will be rewarded.

Cheers PB

 

[Granger2]

Yeah, CalMed and Frank have it. Just run it during 12/12 with bloom tent. And 1500 - 1800 is too much. Actually, I don't believe that keeping it high 24-7 in a sealed room is a waste of CO2. It just isn't used till the lights come on, and your plants won't like having it forced on them at night. I don't like using it during the last hour of 12. Just me.

If you are upping the whole room, I would run it with the sensor in the bloom tent if possible. I would have LOTS of circulation in the main room also. And, the veg tent should do without during the last 2-3 weeks of bloom, since you'll be wanting to cut the ripening plants back to 4-500. Good luck. -granger

 

[Sinisterzane]

Does anyone know if its possible or advisable to split one x co2 pipe into 2 tents? I am asuming you can get the pipe..put a Y splitter on it and push the pipes in near the top of the tents?

 

[Sinisterzane]

Does anyone know if its possible or advisable to split one x co2 pipe into 2 tents? I am asuming you can get the pipe..put a Y splitter on it and push the pipes in near the top of the tents?

Anyone any ideas why this cant be done?

 

[CasioCalculator]

I would imagine you would want some sort of valve for each of the outputs so that they are both releasing the same amount. If you are using bottled CO2 with 1/4in air line, you could use an aquarium gang valve but you would need a CO2 meter to be sure you have it adjusted so that each line has equal flow.

 

[Stonefree69]

I just use my house as a lung room so my plants AND me are getting about 800-1,000 ppm 24/7. I heard much over 1,200-1,500 ppm can be a waste and even counterproductive.

 

[Avinash.miles]

Does anyone know if its possible or advisable to split one x co2 pipe into 2 tents? I am asuming you can get the pipe..put a Y splitter on it and push the pipes in near the top of the tents?

its do-able, a y splitter like u said, i used to do that just to run a line down each side of the room to disperse the co2. you will have to use more pressure to get enuf co2 from each line

i like ur idea, using the basement as a lung room for the two tents to draw from... it COULD work, but will b much harder to dial in than if co2 is dumped directly into each tent, trust me / us
also dont forget to dump that co2 right onto ur plants

id say 1300 max daytime, spurrs onto something
at night they are not photosynthesizing so they need very little, aka no supplementation, natural ambient co2 at any altitude is enuf for ganja plants during the "night" cycle, i would add none in the dark cycle, maybe turn ur co2 off for the time that both tents share dark time....

 

[moses wellfleet]

Does anyone know if its possible or advisable to split one x co2 pipe into 2 tents? I am asuming you can get the pipe..put a Y splitter on it and push the pipes in near the top of the tents?

i wouldnt think this is possible because you only have one regulator and one monitor with one sensor so you cant control enrichment in two separate spaces.

exactly which co2 monitor have you chosen to purchase?

a detailed diagram of your design would help a lot!

 

[growshopfrank]

Does anyone know if its possible or advisable to split one x co2 pipe into 2 tents? I am asuming you can get the pipe..put a Y splitter on it and push the pipes in near the top of the tents?

it can be done all that you need is a Y splitter 2 solenoids a SPDT relay and a timer

 

[Sinisterzane]

Both the tents will be in veg at the same time and both will be in flower at the same time but with the 12/12 lights flipped (one tent on at night and other in day)

During veg we will be using 2400W of light in each tent and during flower we will be using 4400W in one and 4400W in the other...there is going to be problems controlling the heat during flower if there is 8800W running at once. This means we cant easily shut down the co2 in the flower tent thats off. Because the fan controllers will be right down within the flower tent with its lights off I am hoping it wont introduce to much co2 in there.

I am going to pipe the co2 lines directly into the intake fans 10" duct tube from the main lung room...there is one of these fans in each tent right at the bottom next to the plants so it should dump it onto the plants.....

 

[Avinash.miles]

yup, put the co2 lines in the intake ducts, exactly u got the idea now rite sinister? its all a game of timers tubes now.... get another tank and regulator and run each tent independent if it means that much to u, or if u get sick of refilling the one so often.
hope that helps

 

[Sinisterzane]

yup, put the co2 lines in the intake ducts, exactly u got the idea now rite sinister? its all a game of timers tubes now.... get another tank and regulator and run each tent independent if it means that much to u, or if u get sick of refilling the one so often.
hope that helps

I am going to try it with one big bottle, one regulator and another spare bottle on standby so I can refill the other one in time and push into each tent via a Y splitter (exact same length) my only downfall here is the fact that due to the whole space being full of co2 when one of the 12/12 tents is asleep it could still have high ppm levels...trying to establish how disasterous this is in real terms...

 

[moses wellfleet]

I am going to try it with one big bottle, one regulator and another spare bottle on standby so I can refill the other one in time and push into each tent via a Y splitter (exact same length) my only downfall here is the fact that due to the whole space being full of co2 when one of the 12/12 tents is asleep it could still have high ppm levels...trying to establish how disasterous this is in real terms...

i run a sealed room. that means 24 hours sealed no venting no exhausting ever, except when the door is openend for access to the room. by the time the flowering lights come on co2 has built up to 2500 ppm!

i have noticed no adverse effects because of this, if you want checkout my albums for 2012 and decide for yourself if there is anything wrong with those buds. i cant remember where i got the info but i am sure there are many others running fully sealed rooms with no problems!