Can anyone share their CO2 chart for ppm and temps??

[Raw710]

Hi, there mate!! thanks for dropping by with your experience, both posts have great info, will give it a couple of reads, my set up is almost the same to yours, I do exhaust a bit of air out, but is because sometimes my house stinks inside

I have a couple of questions, when at 84ºF what was the RH?

The reason I was going on such a high schedule comes from the fact I have a light that can put 1200 PPF out, and the logic I was following is more light intensity= more EC, more Temp, and more RH+ CO2. I had in mind a max of 1400 ppm when the light was at max, but at the 4th week i realized the plants were not taking much more, did a little wash in some a dropped EC on others, my guess is the max they are going to take is 2.2 (if) very similar to the values you were using. I think SPYDR´s put more light than 1000W HPS? not sure 100%

looks like I will need another crop to see if I understand better what I am doing

I use a Luxometer that was calibrated against a PAR meter and 1200 ppf is somewhere in the region of 50k lux ( In the hottest spot, at the center), but the SPYDR´s are very good at the way they distribute light, so the other plants are getting 48k/43k and values like that. With that intensity not trying to see how far you can go would be rude, that's why by 4th week I was already on
2.0EC.1100ppm.1000ppf.28ºC.75% RH

The reason I was advised to bring RH down to 55/60 is that the plants can get brotitis, powerful reason to bring it down, but this brings sooo many questions again

Thanks again for your help, if you feel drop by my grow diary down bellow, there I publish every week what's going on with the first CO2 enriched high light intensity grow, Am sure I could do with your opinion around there

I think you can run high RH but just have to have the air flow to back it up.

 

[thugpoet]

I think you can run high RH but just have to have the air flow to back it up.

Good luck maintaining anything above 70% at the end of flowering without mold issues, no matter how much air flow you have (and you're already limited if you're running co2 to begin with).


Pretty sure most people would rather have plants slightly stressed due to higher transpiration than with rotted buds.

 

[pacoclandestino]

I think you can run high RH but just have to have the air flow to back it up.

word, you need a lot of airflow, and a strain that is resistant to mold

 

[pacoclandestino]

I run my rooms as close to the Vapor Pressure Deficit Chart as I can.
I use a lung room to condition my grow room air and the CO2 line disperses into the intake from the lung room.
Max temp for CO2 is generally viewed as 86F and at that temperature some growers have a built in temperature sensing shut off on the CO2 tank Solenoid or run to the on off switch of a propane generator.
In rooms capable of achieve max light senarios of 4000lumens below the canopy (rare) which generally only occurs in full sunlight, growers can push the confines and boost CO2 to 2000ppm @90F ….. I have not tried that personally
It's been many years since I worked with CO2 enrichment but may do again one day

If everything runs perfect and your plants are fed and lit well enough to actually make use of that extra CO2. 30% dry yield increases are achievable.
Using CO2 with addressing all other parameters to suit, is a complete waste of time.

Very interesting info you are giving me there,I ve also heard of people finishing crops at 1500 PPF and saying they believe they could reach higher,My guess is Cannabis could evolve geneticaly after many high intensity crops and crosses you could have a strain able to take way more sun energy when outdoors...or maybe i am just day dreaming?


dont get me wrong I can see a huge increase in Yield, the problem is that as soon as the Fluence guy told me to be aware of brotitis at that RH I chickened out,and brought back the RH to 55% and a VPD sound 24/25ºC. I am alternating between 1.8EC and 2.0EC in the waterings and I still have 7th week to bring it up further,CO2 have being at 1200 ppm for the last 3 weeks,that I remember.


I have a feeling with this LEDS and a strain that is mold resistent you gould go from 5th week at 28ºC-75% RH and 1200ppm CO2- light intensity at 1200 ppf, i have a feeling I could have done it, but I chickened....this will be tried again at some point whenever i can afford to lose plants, aint the case now and i expect lots of fun tasting the same strain from 60 different seeds, i can spot 4 different phenos, lets hope they are terpene rich, scent is awesome


I guess tomorrow I will update my grow diary, its just unreal how different the plants look after growing under led compared to CMH


Thanks again mate, your knowledge is apreciated