Air quality in sealed room choking plants?!

[nlr433]

So this is the third time I've pulled plants from my veg room into the bud room right next door that I've had this problem. Both sealed rooms. Seperated by one wall. Individual ac units, both running co2. This time I only moved half my plants to the new room to see if it was actually an air problem. Sure enough 2 days later they are all curling up, red stems, looking stressed as ever. While the plants still in the veg room look great. Over the last three switchovers I've ruled out over flushing, under flushing, over/under feeding, co2 introduction, possible bleach residue left in the room after post harvest cleanng, the nutes themselves, hps introduction from mh, and havent had bugs. I've tested it all, and it comes down to air I think. Could my 5 ton air handler be causing something in the room to choke up the plants? Anybody know any way of really testing the air quality? Or what id be looking for that could do this? Or any other ideas?
Any advice much appreciated

 

[nlr433]

This is my pic from two crops ago that the growweedeasy people used the image to show overwatering but was most definitely not the case. and I'm seeing the same curl now, under totally different circumstances
http://growweedeasy.com/sites/growweedeasy.com/files/over-watered-cannabis.jpg

 

[Johnny Redthumb]

what is your relative humidity where you moved your plants? AC might be drying out the air in the room too fast and the plants havent filled in the room enough to transpire h2o to maintain enough RH. below 20-30% RH and plants start to shut down growth and conserve water. closed stomatas.

 

[Treetroit City]

What about light levels?

I have found that I need to "harden" my plants off when they go from 600's to 1000's.

I do this by turning down my flower lights to 600 upon entry and slowly increase them over the course of a few weeks.

Looks a lot like mine were before I started doing this.

You're not using Gavita's per chance are you?

What are your co2 levels?

 

[fishwhistle]

Nlr,Is there a way to vent fresh air into the room a couple times during dark cycle?I know this goes against sealed room theory but i have seen it work before.I beleive the plants when they are just flipped are just not big enough to put out enough o2 out in dark cycle yet which seems to lessen as plants get larger,just a theory.I am all ears as to JRs and third coasts opinions also as im about to do this again and would prefer not to vent at all if possible.

 

[Treetroit City]

I've been really close to cutting up my room.

Even bought a couple dampers and timers for the two vortex I have sitting around.

It will be a last resort though. I want to stay sealed if at all possible. My plants have snapped out of it after week two and most grow just fine, a few get locked up so bad they never recover.

I recently put in a crop and they did and are doing great. First time I can say that with my new rooms.

In a sealed room plants are making O2 all day long so I don't think it is a choking problem.

 

[Treetroit City]

Nlr,Is there a way to vent fresh air into the room a couple times during dark cycle?I know this goes against sealed room theory but i have seen it work before.I beleive the plants when they are just flipped are just not big enough to put out enough o2 out in dark cycle yet which seems to lessen as plants get larger,just a theory.I am all ears as to JRs and third coasts opinions also as im about to do this again and would prefer not to vent at all if possible.

Maybe because I run perpetual the older plants now produce enough O2?

All I know is plants at week five are humming along so it's not an atmosphere thing. It's a transition thing.

 

[siftedunity]

What about light levels?

I have found that I need to "harden" my plants off when they go from 600's to 1000's.

I do this by turning down my flower lights to 600 upon entry and slowly increase them over the course of a few weeks.

Looks a lot like mine were before I started doing this.

You're not using Gavita's per chance are you?

What are your co2 levels?

that's strange I move mine from 90w t5's to 1000w hps with no issues at all. infact three days later the growth has increased dramatically.

 

[Treetroit City]

that's strange I move mine from 90w t5's to 1000w hps with no issues at all. infact three days later the growth has increased dramatically.

Regular 1000's or 400 volt Double Ended bulbs?

Big difference.

It's more like going from T5's to the summer sun. Will burn shit up.

 

[siftedunity]

regular 1000w aircooled hps about 2.5ft from the lamp. i see the double enders are more power full though.

 

[Treetroit City]

I don't know.

My first couple crops looked just like op's

When I turned down my bulbs and went with smaller plants, thus further from the bulb, they perked up.

It comes down to photosynthesis and why they are not happy.

I do not believe it is an air quality problem, those are good size plants that are going to make O2 all day long to use at night.

If his CO2 numbers are over 1200 I could see that contributing...

I'm down to 900 these days cause my plants were looking like op's

 

[Treetroit City]

And it's a transition thing.

Here is a plant that went through this and recovered in week three. She's now week five

She looked like op's pic at day10.

 

[nlr433]

thanks for all the insight guys. Yesterday was a stressfest and I didnt have a chance to come back on here. the RH when they went into the room was 60% and really never goes below 40%, the lights keep the rh in check during the day and i have to run a dehumid at night.

They ARE in fact under 1000watt gavitas, but I did turn them down to 600 when I moved the plants in. BUT the whole crop was under 3x 1000w gavitas in the veg room for the last two weeks before I switched them over.

C02 in the veg room was at 1200 for the last two weeks before the switch, and went into 1200 in the bud room as well. I'll drop them down to 900 today.

Some others have mentioned possibly venting during the dark cycle as well, which I suppose is an option. However, some of these plants are 5' + and I would think are totally big enough to produce the o2 they need.

Like i said in the og post, this is the 3rd time i'm dealing with this exact same thing, and they do relatively snap out of it 2 weeks in or so, but I know this is heavily effecting my yeild/quality as they never fully recover.

 

[Alone]

They look like they are under major heat stress, trying to get away from the heat pounding on them from above.
Whats your temps? In a sealed room w/ Co2, alot of heat is created. A de-humidifier in a sealed room at night will create alot of heat as well. I certainly hope your garden is computer controlled.

 

[nlr433]

all lamps are at least 2' away from any plants. i've done the hand test under the lamp to make sure I'm not anywhere near being too close. the room is not computer controlled, but wirelessly monitored 24/7. temps stay between 70-78. maybe a dip to 67 at night.

 

[Alone]

Thats a good zone to be in. Im not sure then. Ill bow out of this one and let the masters take over.

 

[anferneybra]

Hey there

I have run into a similar looking issue in a newer sealed room. My problem came from sealing the room, having 90 plants in 10 gallon pots. I ran CO2 during lights on with my Atlas3 at 900 ppms. Then when lights off the ppm would rise to 1500-1600 ppms. This is because plants exude CO2 in the dark phase. The air became very stagnant and was basically choking my root zone. After all the possible solutions from friends/family, this is the conclusion I came to.

The solution was quite simple for me, toss my carbon scrubber on for about 30 minutes at lights off, and 30 min every 2 hours, to empty the room. My room is 20x20 with 11 foot ceilings. My 8inch can fan on a can 100 filter clears the room in about 20 minutes.

I think if you have a digital CO2 meter you will find that your nighttime ppms are quite high. If this is not the case, and you are sure you are not overwatering, then onto the next guy! haha! good luck!

T

 

[jman11]

its the air conditioner shock for sure. Ihave the same exact symptoms....( I have a 3 and 2 ton ac's in one room) and If I am just running one, all good, running both, they look like yours, plants cant keep up with the AC.

Whats your RH at?

Ultrasonic foggers the way to go imho.... keep em sealed.

 

[LAMBS-BREAD]

It looks close to poison gas too, U don't have some bad plastic throwing off gas in there?

 

[Beavinator]

Years ago I had this very issue. It was when I ran my flower room sealed. When you are running sealed rooms if you are only running one flower room then you need to vent it in the dark cycle. Otherwise the co2 levels get way too high in the dark. The best solution is to run 2 flower rooms one on for 12 hours then the other on for 12. Then what I did is get 2 10 inch 3 or 4 foot long charcoal filters and 2 10 inch inline fans (could also use 12 inch). Then cut 2 10 inch or 12 inch holes in the wall separating the 2 rooms and run some ducting. Have 1 fan blowing into one room and the other blowing back so you are stirring up the 2 rooms. Duct it so that the entire rooms get stirred good. This will help out in lots of ways. First the room in the light will keep the dark room from getting too high co2 level. Second it will help remove humidity in the room that is dark. Third if your light room gets too hot it will kick in the AC in the dark room. I used thermostats with day and night settings so I could keep the room in dark 10 or so degrees cooler than room in light.