Co2 burner issue???

[roasthawg]

Please talk me off my ledge here... This is driving me crazy. We recently built out a new spot with two twenty light flowering rooms. We veg in a separate room with no problems. Move them to a flower room and things seem to be fine at first... After about three weeks all the sudden plants get deficient. Different strains show different issues. Some look like calmag, some phosphorus, every strain is different.

Everything we're doing here is the same as at other flawless spots... Only two things I can tell that are different are new tables and using a burner instead of bottles.

On my recent run to have issues at the three week mark I have a few whites about half way down the table. The strange thing I've noticed is that the plants directly under the co2 burner have badly canoed leaves. The ones further away do not. Has me thinking it's an issue with the burner. I've read all about ethylene and I do exhaust my rooms at night. Have also recently started exhausting a couple times during lights on as well. I just don't see how it can be an issue with the burner... So many peeps run burners just fine.

Anyways, in rockwool. Running gh flora series. Ro water. 80f lights on, 74 lights off. Humidity is set at 55% right now. Have ran my co2 as high as 1500ppm but have progressive brought it down. Plants have developed symptoms without it going over 600. I'm running at 400ppm now while I sort this out.

One of my two rooms had an issue with the intake fan seizing up. It only had an exhaust fan going for about a week and in that week is when symptoms showed... But it was also week three so who knows?

Would love to hear what others think. Thanks.

 

[stoney917]

Take what I say here with a grain of salt ..... I am by no means the expert on co2 but my new spot just got burners hung so I put some thought into this exact subject recently hoping to prevent this n make the switch smoother.... Lower the co2 or raise ur ppms .... Co2 plants eat more from what I'm told... I never go above 1.4 ec max but I think that will change. Also co2 plants like more humidity that whole vpd thang.... The plants under the co2 burner are probably sweating... These are just thoughts not facts n future issues I was thinking about... I will say this environment is always key and most likely the issue just gotta find the place that makes em happy... Thanks for this post I hope some more experienced head come in and drop some fact.... I'm not gonna fire up the burners till I see where this goes ... As I'm a firm believer in co2 is not nesessary.... And sealed rooms are much more of a headache...

 

[stoney917]

1500 is kinda high right????? I'd ease em in or veg in the same similar environment had an issue when I was veggin off site in a vpd environment and every time I moved the plants the got serious shock... But that was do to many factors

 

[Mikell]

Read spurrs thread on CO2. A lot of what you're doing is counter productive.

Ethylene is a by product of incomplete combustion. Look for blue flames, yellow or yellow tipped flames are cause for concern.

Some rooms are sealed too well, and can start to deplete oxygen faster than seepage provides. Minimal air exchange can be beneficial. Do no create excessive negative pressure.

Burners should be hung high, away from fans and combustible material. Plants placed too close will always fail.

Good luck

 

[OG Tree Grower]

Need more info, I can't pick out anything that bad from your op, could be several thing contributing.

When your intake was off did your temps get over 85 lights on?

Are you sure your co2 reading is accurate? Calibrate it, I've seen them way off before if it wasn't calibrated right, these things are sensitive to your breath when calibrating

Something change with your medium? Ph imbalance? Watering schedule?

If I had to guess and I mean a stab in the dark, I would think high heat and high co2 made your plants go into overdrive , with a possible ph issue you would immidatly show several deficiencies

And like mikell said , sounds like some plants may to to close to the burner. Can you relocate it to a lung room?

 

[roasthawg]

Need more info, I can't pick out anything that bad from your op, could be several thing contributing.

When your intake was off did your temps get over 85 lights on?

Are you sure your co2 reading is accurate? Calibrate it, I've seen them way off before if it wasn't calibrated right, these things are sensitive to your breath when calibrating

Something change with your medium? Ph imbalance? Watering schedule?

If I had to guess and I mean a stab in the dark, I would think high heat and high co2 made your plants go into overdrive , with a possible ph issue you would immidatly show several deficiencies

And like mikell said , sounds like some plants may to to close to the burner. Can you relocate it to a lung room?

Room has a twelve foot lid and the burner is hung at the top with the gavitas. The intake being off helped temp stay down if anything as the air I'm bringing in is hotter than the air in my rooms. But to answer your question, no temp never went up.

Something I was thinking about, my rooms are 42x12... I'm running the Titan ten burner unit with all ten on that's rated for rooms 40x40 or smaller. It's controlled by the iconic brain. Calibration is correct and the flames are blue whereveri check but could be that ten burners is too much? I'm gonna turn most of the burners off and see what happens.

 

[roasthawg]

Read spurrs thread on CO2. A lot of what you're doing is counter productive.

Ethylene is a by product of incomplete combustion. Look for blue flames, yellow or yellow tipped flames are cause for concern.

Some rooms are sealed too well, and can start to deplete oxygen faster than seepage provides. Minimal air exchange can be beneficial. Do no create excessive negative pressure.

Burners should be hung high, away from fans and combustible material. Plants placed too close will always fail.

Good luck

Room is definitely super sealed. Could be an issue. There has been extreme negative pressure in one of the rooms as the intake fan was down. Why no negative pressure??

 

[OG Tree Grower]

Any time I had mutipal deficiencies it was related to ph. Sometimes when I switch up mediums or feeding methods I experince these symptoms until I get things dialed in. Is the medium staying to wet or to dry? Maybe parts of the medium arnt getting watered?

Can't see the amount of burners being an issue, as long as the controller is shutting it off at the desired ppm

Plants create enough oxygen to survive quite well in a totally sealed room, As long as your flame tips are blue then eythelene shouldn't be a problem

I had a friend swear to me he had a bad batch of propane that almost killed his plants, said it burnt with a bit of black smoke and then a few days later plants started dieing off, replaced the bottle and things improved.

When I get problems like these I usually sit there smoking joints until I notice what I fucked up on or changed and sure as shit it's almost always something obvious and my fault when I do find it. Something changed if all your other mock grows are doing well

Last time this happened to me was because of 4" rw cubes. A good sog friend cut me clones and did me a "favour" putting them in 4" cubes, assuming I was still doing a drip sog, unfortunately they went into hydroton buckets. I never thought much of it and planted them with my normal drip ring, well it didn't wash the cube out from the top so ph climbed in the cube and so did toxic levels of nutes, I didn't figure it out u til the rw cube got white and crusty with salt buildup. Such a stupid mistake just because I changed something so small and didn't put any thought Into it, hope this helps somehow. Best of luck

 

[Mikell]

Room is definitely super sealed. Could be an issue. There has been extreme negative pressure in one of the rooms as the intake fan was down. Why no negative pressure??

I believe it uncalibrates the flow through the regulator, but I'm kind of shooting from the hip there. Just a passing tip from a gasfitter, and it was more a performance issue than one of function as I recall.

That sounds pretty dodgy for the ol' memory.

 

[roasthawg]

I believe it uncalibrates the flow through the regulator, but I'm kind of shooting from the hip there. Just a passing tip from a gasfitter, and it was more a performance issue than one of function as I recall.

That sounds pretty dodgy for the ol' memory.

Gotcha... Fans run at lights out except for a few short bursts. Probably not a pressure issue.

 

[roasthawg]

Any time I had mutipal deficiencies it was related to ph. Sometimes when I switch up mediums or feeding methods I experince these symptoms until I get things dialed in. Is the medium staying to wet or to dry? Maybe parts of the medium arnt getting watered?

Can't see the amount of burners being an issue, as long as the controller is shutting it off at the desired ppm

Plants create enough oxygen to survive quite well in a totally sealed room, As long as your flame tips are blue then eythelene shouldn't be a problem

I had a friend swear to me he had a bad batch of propane that almost killed his plants, said it burnt with a bit of black smoke and then a few days later plants started dieing off, replaced the bottle and things improved.

When I get problems like these I usually sit there smoking joints until I notice what I fucked up on or changed and sure as shit it's almost always something obvious and my fault when I do find it. Something changed if all your other mock grows are doing well

Last time this happened to me was because of 4" rw cubes. A good sog friend cut me clones and did me a "favour" putting them in 4" cubes, assuming I was still doing a drip sog, unfortunately they went into hydroton buckets. I never thought much of it and planted them with my normal drip ring, well it didn't wash the cube out from the top so ph climbed in the cube and so did toxic levels of nutes, I didn't figure it out u til the rw cube got white and crusty with salt buildup. Such a stupid mistake just because I changed something so small and didn't put any thought Into it, hope this helps somehow. Best of luck

Not ruling out a pH issue as I upped calmag and lowered pH once I saw signs of deficiencies in the first run.