The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Co2
Chaweeder
started grow question 5y ago
I just put co2 in my flower room should I turn off my exhaust fan and other fans in the room? I'm using a 20lbs bottle and reg,
Solved
Setup. Ventilation
likes
Bloombuster
answered grow question 5y ago
Привет, друг! 👋 Нет, не выключай вентилятор! CO2 тяжелее воздуха в 1.5 раза! он опуститься вниз, в районе пола и будет у корней, там где ему и нужно быть! 👌 Удачи, бро! ✊😇
likes
Complain
Selected By The Grower
Similar Grow Questions
Solved
DeepWaterGrower
Wind and air in the grow box (VIDEO)
Hi guys, some rookie questions for you. 1) Air in the grow box; 2) Wind in the grow box. More details in the comments section
Week 2
Setup. Ventilation
4y ago
9
5
Solved
Wyregrasser
Additional environment control
Options for extra humidity and temperature control. Continuous drain not a problem. My Rh can stay in the 80% range for weeks. Attempting to control a 10x10. Would a small window Ac remove enough humidity (easiest)? Portable AC/Dehumidifier? Stand-alone dehumidifier? Suggestions?
Setup. Ventilation
3y ago
1
1
Solved
dauntless
Humidity at night. Should I add a heater or...
Lights on day, my temps are perfect, and my humidity is 55-59% at 74-80 degrees F. Night, temps drop to the 60s and humidity goes up to 70-78%. Bought tiny dehumidifier to add, and I could also small heater. Is 70-78% gonna mess me up? Indoor/Outdoor And Winter is coming. ;)
Week 11
Setup. Ventilation
5y ago
2
Solved
Percy
New tent
Hs40 tent with marsydro ts600 or philzon 600w Running with black orchid 4" intake ventillation kit and mix flo inline for carbon filter is this a good set up Or should inopt for the ts1000 with dimmable options my tent is only small and dont want burn etc please help
Setup. Strain - Autoflowering
Setup. Lighting
Setup. Ventilation
4y ago
6
7
Solved
Newbiegrower420
Best Humidifier for 3x3x2 grow tent and best way to set up?
I’m about to buy a dehumidifier. Finding one with programable humidity levels makes them too big 4 my tent & the small ones can’t be programmed to turn off when humidity is too low. Can I get a cheap one with no controls and manage humidity with my Humidistat alone? Will it work?
Setup. Ventilation
5y ago
1
3
Solved
Funkygrower
Extractor fan!!!!
What size extractor fan should I buy for my tent. Someone said a 6inch will do for my tent?
Setup. Ventilation
4y ago
1
1
Solved
Theia
What air temp and RH should i be trying to acheive for flowering?
What should i be trying to acheive with RH and air temp for flower stage. I recently was subject to some intense heat and RH shot up to 92%. I have ordered a De humidifier to combat that and i have a fairly decent control over the air temps but i am not sure what i am trying for.
Setup. Ventilation
5y ago
4
4
Solved
Superjd
Overheat in tent? Measuring Correctly?
HID lights on seedlings day 2 (25 cm dist.) I was alarmed by temperatures rising since yesterday to 35 despite exhaust & small fan inside tent. Tent doesn’t feel overly hot. moving sensor to above light it reads at a good 26-27. What’s the best way to understand tent temperature?
Setup. Ventilation
6y ago
2
3
Solved
NicoKh
AC vs CO2
Hello Community! have a little answer or debate: Working with proper led lights, in a grow tent, im heading weeks with 30ºc normally i'll turn on the AC, but this time was wondering about CO2 during the day on flowering weeks and only in the warmer weeks.what would u do?
Setup. Ventilation
5y ago
3
4
Solved
fuckitimhigh
Can a carbon filter be too "big" for an exhaust duct fan?
Is it fine to use a carbon filter that can handle twice the capacity of the airflow my fan can produce? Or will the fan have trouble ventilating the tent then?
Setup. Ventilation
4y ago
1
1
Solved
PenguHB
Dehumidifier advice
I am looking for an efficient, non-electric dehumidifier for the grow room. Do you think one of these would work? Can you recommend anything specific? Are they effective? About 30m3 total grow room volume.
Setup. Ventilation
4y ago
4
4
Solved
CannabisRelated
Is that clip on fan going to cause wind burn? should I lift it up higher? It is on the low setting as well. (week 11 video of fan)
Setup. Ventilation
5y ago
1
Solved
TeeAychCee
Best way to cool your tent/ growbox?
So I’ve built a custom growbox using an IKEA wardrobe, air vent for intake, two circulating fans, carbon extractor exhaust, and a 600W LED grow light. Temps average at 29 degree Celsius with the lights on full, is this too high? Best way to bring the temps down? Many thanks!
Setup. Ventilation
4y ago
2
2
Solved
alhambra
Temperature Probe. Where to place it?
I use a Vivosun exhaust and control hub. It comes with the temperature and humidity probe. I am curious, based on experienced growers here, where do I place this probe? On the floor or do I let it hang mid-way in the the plant itself?
Setup. Ventilation
3y ago
4
Solved
Herbinator
Can RH be raised to 100% for short periods of time?
My extraction is noisy and the humidity is causing a sore throat at night. Can I switch it off and raise my RH to 95% on a regular basis without stressing the plants? I have an indoor grow 2"x2" that runs full ventilation. RH rises from 70% to 95% after 30 mins of no venting.
Week 6
Setup. Ventilation
5y ago
2
Solved
BullWeedDog
Humedad dentro del cultivo
La humedad está llegando dentro de mi cultivo al 80% y hasta el 90%, he comprado un reductor de humedad que venden en el supermercado de estos que reducen la humedad y llevan unas piedras adentro. Esto le hará daño a las plantas??
Other. General questions
Other. Other
Setup. Ventilation
3y ago
1
2
Solved
Melacola
Humidité
Humidité varie pas mal et j ai investi humidificateur mais sa ne résout pas le souci ventilateur 2 et deux entrés passive mais je pense trop de plans et je suis dans un endroit sous sol merci bien à vous l humidité n est pas bonne pour la floraison
Week 8
Setup. Ventilation
2y ago
4
5
Solved
TerpTurtle
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.
Week 11
Setup. Ventilation
5y ago
3
2
Solved
HappySkunk
Tent heat - needs to go down. Tent gets to 30c when closed.
I want an air intake or something that can cool down an 80x80x180 tent. I don’t have the option to put anything through a window and the air in the room around the tent is pretty warm, so I don’t know if an intake will help. Any advice on what to buy for a small tent?
Setup. Ventilation
6y ago
5
6
Solved
Buddie
Humidity problems
Having humidity problems.using 4 inch inline fan with a carbon filter, 400w hid with enclosed hood.(dwc)2weeks from finish Which is better to lower humidity, bigger fan or a dehumidifier? And if a dehumidifier,big one or small one like off amazon.
Week 12
Setup. Ventilation
6y ago
1
1