Buddo123
Member
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.
2 x 4 Tent Looks a Little Full
- Thread starter Buddo123
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- 2 x 4 x 5 tent
Renfro
Well-Known Member
Do you run your exhaust system when the lights are off?
Buddo123
Member
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
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.
Buddo123
Member
I guess that question was for jtrizzy... but maybe my answer will help the cause
Buddo123
Member
Hey jtrizzy
Renfro had some tips on humidity for you, see page two, check his super grow if you get a chance, sweet !!
jtrizzy
Well-Known Member
yea full speed 24/7. still gets up there. better lately but still hits 72 with lights off.
Renfro
Well-Known Member
Whats the ambient RH%? What is the CFM of the fan?
jtrizzy
Well-Known Member
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
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.
jtrizzy
Well-Known Member
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
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.
Renfro
Well-Known Member
That looks like a full on male not a hermie.
Buddo123
Member
It had the nice white Pistils as well, my bad I didn't show them in the photo.
