Humidity problem

i live in alberta its super dry, i have a grow tent with a humidifier inside and fans for intake and outtake, when the fans are on 24/7 it doesn't even get up to 60% humid so i have to turn the fans off every hour for half an hour, (have a timer set like this (1 hour on, half hour off, one hour on ect...) unfortunetely this means that smell is gona sneak through the intake hole when the fans not running, i have a filter on the outtake, should i put one on the intake as well, just a carbon filter?

thanks,
brian

How will that help since you need a fan running to use the filter? your humidity only needs to be about 50 percent in flower id run the humidifier in different locations and see where it works best, probably somewhere farther from the tent but in the same room, if you can hit 50 with fans on your good..if you are close to ok you can Missy the under side of your plants two or three times a day to help just a little more...that's what I would try first anyway

if a filter was there it would block the hole so the smell couldnt escape from the intake, ill try setting it up outside of the tent thank you

I'm not sure what question you are even asking. Humidities in the 20s and 30s are generally fine. On the low end, but better too dry than too humid.

AimAim said:

I'm not sure what question you are even asking. Humidities in the 20s and 30s are generally fine. On the low end, but better too dry than too humid.

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^^^^^^ This.

Ehhh just because it works doesn't mean its right...optimal humidity is around 50 plus thelet the humidity the less room for error..one hot day that drops the humidity farther and your leaves lose the ability to transpire and start to die...id try to raise it best you can but you should be ok

Optimal humidity is around 50%+ in bloom? Says who?

Cannabis originates from semi-arid climates you know. Low humidity is definitely more optimal than an RH of 50%+, and plants do not "loose the ability to transpire" when the air is dryer. Worst case scenario you'll need to water more frequently. A plant isn't going to keep its stomata closed and hinder transpiration at an RH of 30% or even 20%, not when it has access to water from it's root system and temperature is not extreme.

Humidity in excess of 60% is asking for mold/bud rot. The denser and larger your colas are, the greater the risk becomes. Of course, if all you grow is fluffy popcorn nugs higher humidity is less of an issue.

Furthermore, the OP stated he is from Ablerta, Canada... not sure any hot days are in the forecast.

I never said + I said only about 50...that's where I like it toward the beginning middle of flower but above 40 and i'm happy..later in mid flower I drop it..your putting words in my mouth and misreading things..I also specifically said keeping it a little higher makes for less room for mistakes and said IF you have one hot day and are at 30 you can slow the transpiration..I don't really know what to tell you the proper humidity level in flowering is 40 give or take so I never said 30 won't work but its on the edge and living things like water in their tissue so I don't like staying on the low side..have proper ventilation and training and you don't mold at that humidity which is optimal for the plant!

Furthermore, the heat would be from his light, for all I know he ruins at night maybe an equipment malfunction?

kermit2692 said:

Ehhh just because it works doesn't mean its right...optimal humidity is around 50 plus thelet the humidity the less room for error..one hot day that drops the humidity farther and your leaves lose the ability to transpire and start to die...id try to raise it best you can but you should be ok

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This is why punctuation and stuff helps, I guess.

kermit2692 said:

I never said + I said only about 50...that's where I like it toward the beginning middle of flower but above 40 and i'm happy..later in mid flower I drop it..your putting words in my mouth and misreading things..I also specifically said keeping it a little higher makes for less room for mistakes and said IF you have one hot day and are at 30 you can slow the transpiration..I don't really know what to tell you the proper humidity level in flowering is 40 give or take so I never said 30 won't work but its on the edge and living things like water in their tissue so I don't like staying on the low side..have proper ventilation and training and you don't mold at that humidity which is optimal for the plant!

Furthermore, the heat would be from his light, for all I know he ruins at night maybe an equipment malfunction?

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With exceptionally dense, heavy colas much higher than 50% RH, even with proper air circulation: mold can result! I am just saying the "proper" or "optimal" or "ideal" humidity during bloom isn't a strict figure; it is a fairly wider range, and the threshold for mold indeed lies right around 50-60%. The ideal range for RH during flower is 25-45%*. I certainly wouldn't recommend anybody use a humidifier during bloom when their RH is typically already around 30%.

You say "just because it works doesn't mean it is right", yet 30% RH really is not only fine- but arguably optimal. Lower RH will actually increase transpiration. Plants get water through their roots, it is transported via the plants vascular system (water moves through the xylem). Water moves into root cells due to osmosis, as the cells have a higher solute/salt concentration and thus greater water potential. Water moves naturally up the xylem due to transpirational pull. With lower humidity, there is a higher gradient for water loss to the atmosphere from leaf surfaces, greater transpirational pull and therefore increased transpiration. When humidity is high and the air is already saturated with moisture: tranpirational pull and water movement through the plant decreases.

Equipment malfunction? Not that one day of 86F+ temperature is really a big deal, but you do realize that could go both ways right? How about running humidifiers to get your RH up slightly past 50%, which really is on the threshold for mold, and then you have an equipment malfunction, power outage, your fans aren't running and it starts to pour out a few days- humidity sky rockets.

http://www.mandalaseeds.com/Guides/Preventing-Bud-Mold