Problem since starting co2

[George]

Hey guys. This problem started in the last cycle. The last cycle I decided to seal the room and do co2 injection. Before this the plants were always fine unless we screwed the pooch with a nutrient problem.

Since starting co2 and sealing the room we began experiencing weird intervenal necrosis, bleaching and crisping. You can see the signs of this starting within 24 hrs of being put in the big room. Its damn near immediate. I should mention we do use the dehumidifier water to save on water costs. The dehumidifier was also added the last cycle due to powdery mildew in the area (also why we sealed the room). Before this we ran just tap water and ro mixed 50/50. Our tap here comes out at .9ec absolutely atrocious.

Anyone experience this?

We run co2 at 1000, temps are 70-80, humidity is 55-65, coco, HG nutes, ph at 5.6-5.9. Ro/dehuey water ca/mg to 0.5ec then add a/b nutes to 1.8ec

Plants come out from the veg area that is a 50/50 split of regular t5 and uva/uvb t5s to get them ready for the hps. The always look green and healthy in veg. The veg area is not climate controlled the flower room is on an environmental controller with co2 control (ppm monitor not just a timer) but right now they are vegging under the hps with the same light cycle as in the veg area.

The first 3 are the stages progressing over 2 days or so. The last pic is in veg to show you how they go in, pretty healthy and green.
Only pests we deal with are fungus gnats that seem to come in every bale of coco. I do not have any pest problems at this time so we can rule that out.

You can see the stems are really purple which to me indicates underfeeding. My veg plants do the same thing until I up the feed but man 1.8ec is up there already but for whatever reason my plants like it. If I run anything like people on here recommend (1.0ec total) my plants will never make it out the veg room.

 

[prune]

Jeez, how expensive is water where you are, that you are forced to use moldy dehumidifier water to irrigate your most precious possession? (f'kn Scottish growers...)

 

[George]

Jeez, how expensive is water where you are, that you are forced to use moldy dehumidifier water to irrigate your most precious possession? (f'kn Scottish growers...)

I don't understand your Scottish remark. Whom are you referring to?

Yes I thought about the possibility of the dehumidifier water being an issue. However the veg plants that use the same water look fine. Quest also has a nice article talking about repurposing dehumidifier water with water tests and it makes me feel that it's not as big an issue as you're making it sound. Please leave your judgements at the door. I don't care for it and it not needed. I treat everyone with respect I'd appreciate the same.

$0.40 per kWh down here....gotta save money anyway we can. Water, nutes, etc etc.

I am also not forced to use dehumidifier water. We have an RO filter but at 3 gallons of waste to 1 gallon of RO is a huge tax on our already drought ridden area.

 

[Farmer B]

Go back to what was working. Maybe a ph fluctuation.

 

[Oreo]

I'm thinking micro nutrient issue.... Manganese or copper perhaps

 

[Oreo]

How close are your lights? Might be something as silly as light intensity....You're changing the air in your sealed room regularly correct?

 

[George]

How close are your lights? Might be something as silly as light intensity....You're changing the air in your sealed room regularly correct?

Lights are over 3ft away when I put the plants in for this very reason. I run 1000w, small room only 2k in there. I only today lowered them to 18".

I am *not* changing the air in the sealed room. I was under the impression this was not how to run a sealed room and that I am not suppose to exchange air? Is this not correct?

I only sealed the room since one variety I run is super sensitive to PM so humidity control is paramount. The co2 tht we run wasn't even for increased yields it was simply so we could run a sealed room as the ambient conditions do not work for us here. 2 cycles since doing the sealed room and this has happened both times.

This condition *literally* shows itself within 24 hours and progresses. The buds still come out great but i can't seem to keep the plants happy like when I was running a non sealed room.

Frustrating for me. I use a Hanna ph meter and calibrate it regularly.

 

[George]

I forgot to say co2 is off the the bottle not a burner. From what I read on sealed rooms venting was only needed if you use a burner and then also only if it's too large for the room causing the burner to let off excess ethylene because it's doesn't burn for long enough?

All I know is my plants were always beautiful and since sealing I can't seem to make them happy. I really have to figure it out as I really can't go back to a non sealed room, and I really don't want to.

Here is the triangle mints (triangle kush x animal mints (animal cookies x sin mint cookies)) I have that is just awesome. She's in a 1 gallon pot here and this was when she was in the non sealed room. She puts out and that's why I'm trying to perfect the environment. But she has powdery mildew here and that's why we went sealed. Since sealing we get no Pm but do get leaves like the ones I posted above not acceptable IMO .

 

[HarvestMoon303]

You can see the signs of this starting within 24 hrs of being put in the big room. Its damn near immediate.

Plants come out from the veg area that is a 50/50 split of regular t5 and uva/uvb t5s to get them ready for the hps. The always look green and healthy in veg. The veg area is not climate controlled the flower room is on an environmental controller with co2 control (ppm monitor not just a timer) but right now they are vegging under the hps with the same light cycle as in the veg area.

Any chance that it's from moving FROM a hotter/more humid area to a cooler/less humid flower room (with much hotter lights)?

I have a tent for veg, and it's always a little warm (83-84 F) and really humid (75-99%). The plants love it under the T-5. When I put them into flower, they went from 83F/90% RH to 60F(lightsoff)/45% RH. They didn't like it too much, and several showed me some leaves that are a lot like your pics. They were eventually just fine, but that transition was harsh. Upping the RH in the first few weeks of flower seemed to help. My lights are also 30+ inches above, and I have never light-burned any plants with this setup.

I have used 1/2 runoff from a clean dehumidifier before, and it worked just fine. I was pulling 5-8 gals a day from the dehuey and running a F&D with a 100+ gal res. I would just drain the 8 gal/day into the res. It was testing at about 30ppm.

Hope that you figure it out. Good luck!

 

[George]

Any chance that it's from moving FROM a hotter/more humid area to a cooler/less humid flower room (with much hotter lights)?

I have a tent for veg, and it's always a little warm (83-84 F) and really humid (75-99%). The plants love it under the T-5. When I put them into flower, they went from 83F/90% RH to 60F(lightsoff)/45% RH. They didn't like it too much, and several showed me some leaves that are a lot like your pics. They were eventually just fine, but that transition was harsh. Upping the RH in the first few weeks of flower seemed to help. My lights are also 30+ inches above, and I have never light-burned any plants with this setup.

I have used 1/2 runoff from a clean dehumidifier before, and it worked just fine. I was pulling 5-8 gals a day from the dehuey and running a F&D with a 100+ gal res. I would just drain the 8 gal/day into the res. It was testing at about 30ppm.

Hope that you figure it out. Good luck!

That's a possibility. The veg area is not climate controlled so it sees temps in the 84-88f pretty consistently and the big room right now does not see much over 72 right now. Maybe it's just shock. The last 2 cycles when this started have been climate controlled so I wonder if upping the temps early on to the 80s then dropping them over a week or so would help. Thanks for the advice bud

 

[Levitationofme]

I have a bunch of small dehumidifiers at work. We use the water on the plants outside.
We have to be fairly careful about bleaching them out, they are mould magnets and we don't want to spread mould odors inside. At least my AADD fellow employee believes this.

He also uses Anti Bacterial goo on his hands at least once every 15 minutes between chain smoking cigarettes. I have lots of fun at work watching.

 

[Cheesegez]

Jeez, how expensive is water where you are, that you are forced to use moldy dehumidifier water to irrigate your most precious possession? (f'kn Scottish growers...)

Guess what numnuts dihumidifed water is the cleanest water you'll get as it's pure R/O water...

 

[George]

Got em back to health. Ec at 2.2 since last post under the hps @5.5-5.6ph also fed with algen extract

The big dehumidifier that pipes into the room took a dump so we bought this portable one to use until the new one gets here. This thing sucks compared to the Quest but at least it works for now lol

 

[George]

Update: still using dehumidifier water and RO from the filter to conserve water. With the strong feed like I've been trying they are kicking ass now. 2.3EC @ 5.5 1300-1400ppm co2. Still no tip burn wonder if I should push em more. Anyway yea, guess I solved it. Co2 means they're gonna be hungry, feed your girls!

Feb 1 Stripped

Feb 6

Feb 11

Feb 16

 

[George]

One final update. Reigned em in. Man they didn't look healthy that first week. Remind me of the snickers commercials. You're not yourself when you're hungry

Edit: wow postimg.org uploads some crap quality. Gotta be a better host.