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
What size fan?
Kayanesta
started grow question 3y ago
What size air blowing fan do you need for a 1sqm (3ft X 3ft) tent? I don’t mean filter although is 6 inch better than 4 inch?
Open
Setup. Other
likes
Answer
TheUk420Show
answered grow question 3y ago
one up one down try keep the air circulating upwards towards your filters or exhaust along as the tips of the leaves are moving you have enough air flow
likes
Complain
Roberts
answered grow question 3y ago
I use 2, 8 inch clip on fans in a 2.3x2.3x5 ft tent. Having good air flow is important.
likes
Complain
Similar Grow Questions
Solved
Greenbean420
Ph water in soil, does it matter?
Does the PH in the water matter if using biobizz soil and nutrients? Leaving the tap water overnight to evaporate the chlorine of course... heard so many things online but does anyone know for sure? Cheers
Week 1
Plant. Other
Setup. Other
Feeding. Other
6y ago
5
4
Solved
GhettoStyle
friends, tell me the second plant looks bad, what could be the problem?
they stand under the same lamp and in the same pot, why does the second one look worse(
Week 1
Plant. Other
Setup. Other
Feeding. Other
2y ago
2
5
Solved
Killerbubu
Nutrientes de várias marcas
Mistura de nutrientes de várias marcas tem algum problema ? Ou é melhor usar tudo da mesma marca ?
Week 5
Setup. Other
4y ago
4
Solved
ukterpdoc
Auto doser options agrotek or mydro lab?
Which system any body with experience please advise me agrotek I think but also I've come across mydrolab both are digital Auto dosers for the sealed hydroponics room im planning for my next run im leaning towards agrotek but mydro lab comes up cheaper
Setup. Other
4y ago
1
2
Solved
VeggieTales
Help cooling grow tent 4x4
Please experienced growers I need advice. I’m runnning a 4x4 grow tent and the temp is constantly 84-87 degrees. How do I lower temp. I have a 190cfm exhaust and 100cfm intake, 2 fans, and a humidifier. Im growing exhausted and frustrated trying to get the temp down.😅please help
Setup. Ventilation
Setup. Other
5y ago
3
5
Solved
The_Northern_Skunk
Can you put your plants into veg after one day of 12/12??
I accidentally left the timer on 12/12 in one of my tents I was supposed to flick it onto 18/6, If I revert it back to 18/16 quick after only one day of 12/12 will this do anything or just slow the veg process down?
Plant. Other
Setup. Other
Techniques. Other
5y ago
2
1
Solved
PeppaWutz
PH drop from 5.8 to 5.4 over night every night
Watertemperature 22 °C, 100 L reservoir (changed every week),Start EC 1.0 and drops to 0.8 at end of week, Ph adjusted daily to 5.8, tent temperature day 27 °C and at night 20 °C, humidity 55%. I add calmag to EC 0.4 and canna aqua until EC 1. Why does my ph drop over night?
Week 4
Plant. Other
Setup. Other
Feeding. Other
4y ago
2
1
Solved
MaxGrowCanada
Any tips with flood and drain, rockwool or scrog would be greatly appreciated😀
Week 3
Setup. Other
6y ago
7
5
Solved
Weediz
Help understanding PH
I have big problems understanding my PH levels. I put in @5.5-5.8 PH (lowered with acetic acid) and the run-off is always too high, about 7-7.5 PH. I started testing my water / nutrients by intervals and nothing makes sense to me. Every test shows an increase in PH, up to 2.7 up?
Week 6
Other. Other
Setup. Other
3y ago
5
4
Solved
Reefaboi
Defo
Should i prune them ?
Week 9
Setup. Other
5y ago
2
2
Solved
GhettoStyle
Friends! Help me figure it out! my pH drops every 12 hours
Friends! Help me figure it out! my pH drops every 12 hours from 6.2 to 5.0! I don't understand what's going on! Canna Aqua + cal-mag + RHIZOTONIC + CANNAZYM fertilizers I don't understand why the pH drops every day for 2 weeks!
Other. Other
Setup. Other
Feeding. Other
5y ago
5
7
Solved
Who_is_grow_are
Taming humidity
I am having trouble with RH climbing to 65 or 70 at night time in the gorilla tent 2x2.5x6'7". I have infiniti inline 4inch as exhaust at the top of the tent venting outwards. I have 4" circular fan blowing onto the canopy 8" away. 2nd fan in hole to bring in fresh air. Tips?
Week 7
Other. General questions
Setup. Other
5y ago
1
2
Solved
peito
Tent
Hey guys I want to buy a new tent for 1 or 2 plants with Mars Hydro Ts600 lighting. Which size do you recommend? Thank you
Setup. Other
4y ago
4
4
Solved
johdlong
Any Suggestions for next time?
Got any good suggestions for next grow based on my most recent diary? We are at day 67 today. What can be improved for next grow? Any good strains or seedbanks for fat buds? If I run autos, can I fit two in a 20 gal of topdress living soil?
Week 20
Plant. Other
Setup. Strain - Autoflowering
Setup. Other
4y ago
4
3
Solved
Nautilus
Lamp choice 1.2x1.2x1.6
Hello im allesting a 1.2x1.2mt and 1.6mt height grow box and im thinking about the lamp to buy, im really curious about cmh tecnology but i never tried it and im scared about the heat it could produce... you think i should go with led? If someone have cmh or led and can help me!?
Week 7
Setup. Other
5y ago
1
Solved
KrautBauer
Temperature and humidity
Currently I have a temperature of 20.1 - 20.5 degrees Celsius and a relative humidity of 44% - Are these values OK? If humidity is too low, what are the best ways to increase humidity?
Setup. Other
4y ago
3
5
Solved
UpInSmoke420
Grow tent sizes
Is a 80x80x160 (w l h) suitable for two autos? Also would would be a better tent for two plants a 120x120x200 or a 100x150x200 cm?
Setup. Other
6y ago
2
Solved
DoziiBoiiz
airflow
Is positive pressure on my tent bad? I Blowing cold air from an AC and its creating the tent to expand. In order to keep the temps down i needed to blow more cold air but its creating the positive pressure
Week 14
Setup. Other
5y ago
2
2
Solved
Qaggy
Silent oscillating fan on the market!
Does anyone know what the quietest oscillating fan is? Mine is just way to load now I have an ac infinity inline. Need to keep the room super quiet.
Week 9
Setup. Other
5y ago
1
1
Solved
carjos
2 plants one pot.
Please have a look at my diary "R.D. take ii", week 2. I have two babies growing side by side. What can I expect from this design? is there any transformation technique I might want to look at? thanks!
Other. Other
Setup. Other
Techniques. Other
5y ago
5
6