Vote Now 🏆 for the Grow Awards 2025!

Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms

Accept

Recommended

Grow QuestionsCO² diffuseur use ?

CO² diffuseur use ?

Hou_Stonestarted grow question 2 years ago

Hey, I added a CO² diffuser bag in my tent. do you have any tips for using it? (smart bag from servovendi) I read somewhere that you have to disable the extractor for the bag to be effective. It's true ?

Solved

Setup. Ventilation

likes

HeavyHittahanswered grow question 2 years ago

I think as long as there is sufficient airflow co2 will get to your plants even with the extractor fan running. I stick mine just above my fan and it does increase the co2 in the tent by 200ppm even with extractor on..

1 like

Complain

Selected By The Grower

Mr_Incognitoanswered grow question 2 years ago

That’s true. Extracting fan will move out all the CO2 very quickly. So you need to reduce fan speed and humidity which is quite difficult.

1 like

Complain

Similar Grow Questions

Solved

2x2 Circulating Fan What is the best circulating fan for a 2x2 tent available on the european market? I bought a Secret Jardin MO20 oscillating fan, and I highly regret it because I have read several reviews mentioning that it can catch fire. Is there any other good alternative for circulating air?

Setup. Ventilation

3 months ago

2

2

Solved

DuschkabinenGrow

Smell through filter exhaust The smell inside is quite strong and is coming through the filtered exhaust. Is this normal, or does it mean I need to replace my filter soon?

Setup. Ventilation

19 days ago

5

Solved

Maintaining VPD I've got my photoperiod doing well in a 2x2 tent. I'm trying to regulate my VPD with what I have on hand. Currently I'm running my exhaust fan for 8 minutes every hour to get an average VPD around 1, but I'm concerned about the swings. Am I micromanaging?

Setup. Ventilation

Setup. Other

a month ago

1

Solved

Is 15min/hour enough ventilation?Is 15min ventilation every hour enough for my 80x80cm 4 plants enough? intake: BLAUBERG 10cm 102 m3/h exaust: BLAUBERG 10cm - 145-187m3/h

Setup. Ventilation

4 months ago

3

5

Solved

Brauche ich unbedingt einen (Schwenk-) Lüfter in meiner Growbox?Habt ihr schon mal ohne (Schwenk-) Ventilator in der Growbox angebaut? Wenn ja, welche Erfahrung habt ihr dabei gemacht? Ich möchte nur ungern einen Ventilator einsetzen, weil das vermutlich die Lautstärke der Box deutlich erhöht. Schon mal vielen Dank für eure Erfahrungen.

Setup. Ventilation

5 months ago

9

8

Solved

White dots on the pistils Hi everyone, what are these white dots on the pistils, they come out with every cultivation, can anyone help me?

Buds. Not fattening

Setup. Ventilation

Techniques. SoG

9 months ago

2

2

Solved

How crucial is an exhaust fan and a carbon filter?I cant find anything in my country as a kit, but would buying them piece by piece work? Example something like in the photo connected to an air duct and then to a carbon filter? Or if the exhaust fan is not crucial? how can i get rid of the smell in a cheaper way?

Setup. Ventilation

a year ago

1

2

Solved

Is a fan nessesary?Do you need a fan if you have a carbon filter with ventilation installed ?

Setup. Ventilation

4 years ago

3

3

Solved

fan from bottom Hi! is it a good idea to blow fan from bottom to plants? Of course i have a fan with carbon filter on top of the box.

Setup. Ventilation

4 years ago

1

Solved

Debutant_dream23

Extracteur et intracteur Salut j'aimerais partir sur la gamme cloudline Ac infinity ! Ma configuration :tent 4×4! 120×120×200! led:800w ! quel type d'extraction en sortie et en intraction d'entrée d'air me conseillez vous ? Je me suis renseigné sur les différents calculs mais en vain éclairé moi 🙏🏻🙏🏻

Setup. Ventilation

4 years ago

2

2

Solved

Connecting 2 grow tents I have a 16"x16" small tent next to a 48"x24"x72" tent. With 1 small plant in the small tent, is there anything wrong with ducting the air from the small tent to the bigger tent where my carbon filter is. Seperate intake and exhaust for each tent. Has anyone tried this before?

Setup. Ventilation

4 years ago

1

1

Solved

I can't control temperature. I'm so discouraged.How are you guys keeping temperatures down!? I have an hlg 600 Rspec at 50% power and the Temps won't go below 81 degrees with the light on. I'm in a 71 degree house. 4x5 tent with a 400+ cfm fan and negative pressure. I also have fans blowing on the plants and the light.

Setup. Ventilation

4 years ago

1

2

Solved

Can I run a 4inch fan to a 6 inch carbon filter? How many plants for 2x2x4?I'm starting a new grow, I have a 2x2x4tent, can I run a 4 inch fan to my 6 inch carbon filter I have or do I need a 4 inch filter?also how many plants 1 or 2? Should I run kingLED 1200watt or 1000watt? Running Auto's either amnesia,blue Dream'matic. Advice opinions appreciated.

Setup. Strain - Autoflowering

Setup. Lighting

Setup. Ventilation

4 years ago

6

5

Solved

Too High humidity? how do i keep it low.The humidity in my tent is about 65%, fluctuating betwwen 60% to a max of 71%. Is this high humidity a problem? What can i do to keep those levels down without a deshumidifier? (1x250Watt CFL inside a closet with a oscialting fan)

Setup. Ventilation

4 years ago

5

3

Solved

Wo kauf ich am besten einen rohrventilator und aktivkohlefilter?

Setup. Ventilation

4 years ago

3

Solved

GoodVibeSpreader

Light and Tent, Indoor Grow ?Hi people, One of my friend planned to grow indoor, he has the perfect room for it but since he's starting and we're growing cannabis on a budget I wonder what light and tent should we start with (for everything else i can help him since I already grown weed outdoor) Thanks !

Setup. Lighting

Setup. Ventilation

4 years ago

1

1

Solved

New Extractor Fan packed in Brand new extractor fan had packed in after 3 days use 🤦‍♂️🏻🤦‍♂️🏻I’ve set up a fan at the end of the cool tube to blow air over the bulb.. and left the door of the room open and put oscillating fan at the entrance. Any advice? Worried about the bulb getting to hot.. 🤦‍♂️🏻

Setup. Ventilation

4 years ago

2

2

Solved

420_Little_Green_Fingerz

Low Humidity 35% is this an issue and how can I increase?Hello everyone. I am having a battle with humidity especially during 'lights off'. I have reduced my 4" rvk fan using a dimmer plug but to no avail still sits around 35% RH how can I boost humidy would reducing temp during lights off would this help? Thank you 💚🙏

Setup. Ventilation

4 years ago

7

6

Solved

climate control Any tips on controlling humidity swings? im trying to balance out the intake & outtake, ive tried to turn off the system just have the dehumidifier run.. but am working harder than I feel like I should. just looking for some tips on keeping a consistent environment.

Setup. Ventilation

4 years ago

3

2

Solved

Dehumidification When the outdoor air dehumidification fan runs it produces a periotic negative pressure in the grow room. What is preferred: a negative or positive pressure in a grow room for this method of dehumidification?

Setup. Ventilation

4 years ago

1

2