2 x 4 Tent Looks a Little Full

Buddo123

Active Member
Should be ok. If in doubt super crop as they stretch and tie down.
You can get 2x4 tents that are 7ft tall if needed.
Thanks for the advice on the cropping Coreywebster. Two plants grew 6 inches in the first week after the flip and 2 plants grew 2 inches.... but If they had all grew 4 inches ...lol.

Cropped.JPG
 

Buddo123

Active Member
Do you run your exhaust system when the lights are off?
Yes I run it 24 hrs, they are a bit smelly lol. I have the speed of the fan set at about 30/35 percent. The fan goes from 0 to 100 % but they neglected to put numbers on it ?/ It vents out the top and I have the two bottom air vents wide open.

The humidity is 51 % in the tent & the temp 25 C/77 F , the house is 45 % & the temp is 20 C/68 F, I have a humidifier on my furnace.

What is your humidity at ?
 

Renfro

Well-Known Member
What is your humidity at ?
Your humidity is fine.

I run swamp coolers to keep my RH% up around 65 - 70% when vegging and stretch phase, once buds start to form I bring it down to 45 - 50%. I rarely have to run the dehumidifiers because the ambient humidity levels here in Colorado are so low. My struggle is keeping it up, thats not as imperative as keeping it down though.
 

Renfro

Well-Known Member
Either the ambient RH% is pretty high or the fan is not adequate. Also helps if you vent the humidity outside so it doesn't just make the whole room more humid.
 

jtrizzy

Well-Known Member
Whats the ambient RH%? What is the CFM of the fan?
My room RH where the tent is in, is around 50-52. My exhaust is a 4" 203 CFM Vivosun blowing into a 4" carbon filter which I just replaced when starting this grow so its not an old clogged filter.
 

jtrizzy

Well-Known Member
Either the ambient RH% is pretty high or the fan is not adequate. Also helps if you vent the humidity outside so it doesn't just make the whole room more humid.
It vents to the room the tent is sitting in but that room is AC controlled. Humidity in the room the tent is sitting never hits above 52.
 

Renfro

Well-Known Member
Well your ventilation system should be able to keep the tent within 5% RH of the room it's in. You wanna exchange the volume of the tent at least 2 times a minute, better 2.5 or 3. That fan should be enough CFM but probably not enough real world CFM because of the filter and duct restrictions or some issue with intake being inadequate. If restrictions can't be eliminated you may need to change up to a 6" setup to have a much better chance of keeping the humidity under control to prevent bud rot and powdery mildew. You may try pulling air without the filter to see if the humidity drops or disconnect any long external duct runs. Something is causing a massive reduction in the CFM.
 

Renfro

Well-Known Member
Also, is the RH% reading you are getting even accurate? Hate to waste a bunch of time chasing a false number lol.
 

jtrizzy

Well-Known Member
Also, is the RH% reading you are getting even accurate? Hate to waste a bunch of time chasing a false number lol.
It’s a battery humidistat posted up in the tent away from the light higher up. Seems accurate, I don’t have any other humidistat to compare.
 

jtrizzy

Well-Known Member
Well your ventilation system should be able to keep the tent within 5% RH of the room it's in. You wanna exchange the volume of the tent at least 2 times a minute, better 2.5 or 3. That fan should be enough CFM but probably not enough real world CFM because of the filter and duct restrictions or some issue with intake being inadequate. If restrictions can't be eliminated you may need to change up to a 6" setup to have a much better chance of keeping the humidity under control to prevent bud rot and powdery mildew. You may try pulling air without the filter to see if the humidity drops or disconnect any long external duct runs. Something is causing a massive reduction in the CFM.
I am going to pull off the filter when the lights go out and see what happens with the RH. If it drops the RH than my filter is clogged again which blows literally.
 

Buddo123

Active Member
21 days since the start of 12/12. The plants are 25 to 27 inches from the top of the pots. I did some super cropping in the past week to try and keep the canopy even & It look like the stretch is slowing down. Starting to bud up nice.
Pic 1.JPG Pic 2.JPG Pic 3.JPG
 
Top