Humidity help!!

Imcamping86 said:

I have one 4 inch fan on intake pulling fresh air in and I have 4 mini fans inside tent . I have one tent flap open half way to let air out . This has allowed my ink bird controller to keep humidity where I need it . I’m not using my vent system until I’m going into flower and removing /lowering humidity . I had the same problem . My vent system is too strong even on low .

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Ok. I may try my fan as an intake below instead of exhaust above i guess. Thanks for the tip.

Renfro said:

Remember that temperature is a key factor in relative humidity. Warmer air holds more water, thus if the air is warmed up it causes the RH% to drop despite the fact the amount of water in the air in unchanged.

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Thank you for reminding me XD I might be screwed unless i vent outside it seems. I cant seem to reduce the heat without reducing the light, and buddy doesnt want that heat recirculating in the room.

Renfro said:

Remember that temperature is a key factor in relative humidity. Warmer air holds more water, thus if the air is warmed up it causes the RH% to drop despite the fact the amount of water in the air in unchanged.

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I mean.. i CAN reduce light intensity, which did the heat trick thankfully, but it seems like a waste.

Imcamping86 said:

I have one 4 inch fan on intake pulling fresh air in and I have 4 mini fans inside tent . I have one tent flap open half way to let air out . This has allowed my ink bird controller to keep humidity where I need it . I’m not using my vent system until I’m going into flower and removing /lowering humidity . I had the same problem . My vent system is too strong even on low .

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i had the same issue. i got a humidity controller attached to a small humidifier, and a temp controller attached to my outtake fan. To supplement more humidity, i also hand two wet towels in my tent and it helped stabilize my RH. now my tent runs on a pretty constant 80F/70RH during veg.

You don’t want your exhaust fan on 24/7, only when needed. If your inkbird is a dual stage humidity control, hook work one to your humidifier in the tent, work 2 goes to your exhaust fan. Now it only comes on when needed and your humidity will stay where you want it. With a home made “Y” adaptor, you can hook up a temperature controller to your exhaust fan and run the whole thing with one exhaust fan. Just keep a couple oscillating fans in the tent and you’re golden.

Frankly Dankly said:

You don’t want your exhaust fan on 24/7, only when needed. If your inkbird is a dual stage humidity control, hook work one to your humidifier in the tent, work 2 goes to your exhaust fan. Now it only comes on when needed and your humidity will stay where you want it. With a home made “Y” adaptor, you can hook up a temperature controller to your exhaust fan and run the whole thing with one exhaust fan. Just keep a couple oscillating fans in the tent and you’re golden.

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Thank you! In seeing too many people claiming to leave exhaust on 24/7, so its what ive been doing. I guess they have the conditions to be able to handle it. I dont aha.

No we just grow in low humidity and don't have a problem.

The quickest answer is stop trying to raise it, you can say I haven't got any knowledge but I would quickly direct you to everyone else doing the same.

BBQtoast said:

No we just grow in low humidity and don't have a problem.

The quickest answer is stop trying to raise it, you can say I haven't got any knowledge but I would quickly direct you to everyone else doing the same.

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It is something ive considered. How low do you go though. At 80f, without humidifier (this place dry as a bitch in winter), it was 20. Not sure how detrimental that is. I would like to follow VPD but beggars cant be chooser.

BBQtoast said:

No we just grow in low humidity and don't have a problem.

The quickest answer is stop trying to raise it, you can say I haven't got any knowledge but I would quickly direct you to everyone else doing the same.

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At 20rh, for week and a half old seedlings, they dont have any high temp/low rh symptoms. They look overwatered though XD told buddy to cut back on waterering. Going to see tonight.

They’d be twice that in proper humidity

Frankly Dankly said:

They’d be twice that in proper humidity

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I dont doubt it gonna keep tinkering around until i find something that works. Good info from all you peeps here. Thanks!

Apocalyptical said:

At 20rh, for week and a half old seedlings, they dont have any high temp/low rh symptoms. They look overwatered though XD told buddy to cut back on waterering. Going to see tonight.View attachment 4810651

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I grow in low humidity, there is no damage possible to our species from it.

Roots need a wet environment, too dry and they die, you will get use to the weight of a watered pot and a pot that looks wet still but is much lighter. You need to keep the soil wet but allow it to cycle from light to heavy.

Don't expect quick recoveries if you kill roots, it will take a few days. Lift the cup, does it feel a lot lighter than when watered? Then water don't look at the top layer. The top layer on mine is just barely starting to dry and I water.

Takes some practice.

BBQtoast said:

I grow in low humidity, there is no damage possible to our species from it.

Roots need a wet environment, too dry and they die, you will get use to the weight of a watered pot and a pot that looks wet still but is much lighter. You need to keep the soil wet but allow it to cycle from light to heavy.

Don't expect quick recoveries if you kill roots, it will take a few days. Lift the cup, does it feel a lot lighter than when watered? Then water don't look at the top layer. The top layer on mine is just barely starting to dry and I water.

Takes some practice.

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Im not new to pot, but i am new to indoors using proper lights within a tent. A country guy, ive grown for years, keeping seedlings under cheap fluorescents, to be brought outside. Watering is no biggie. Its moreso trying to dial in to a proper internal environment. On a side note, they grew like crazy the past two days.

Water is a buffer against heat as well, dry soil heats quicker and hotter.

For fluorescents you only need to set the exhaust in a tent, internal fans not needed.

The exhaust sets your tent to the room temp which you control. Easy in the right environment.

Frankly Dankly said:

They’d be twice that in proper humidity

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Low humidity, your wrong about this just spreading rumours.

BBQtoast said:

View attachment 4810812

Low humidity, your wrong about this just spreading rumours.

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Personal experience bud. Don’t be a right fighter, it’s not a good look.

Frankly Dankly said:

Personal experience bud. Don’t be a right fighter, it’s not a good look.

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The point is I am right and low humidity common indoors. Ignore it and learn to grow like your meant to. I can't change humidity outdoors when it's low, don't see outdoor plants having your experience or problems.

It wasn't humidity, I'll rule out calmag and pH if your in promix or soil straight away too.

BBQtoast said:

Water is a buffer against heat as well, dry soil heats quicker and hotter.

For fluorescents you only need to set the exhaust in a tent, internal fans not needed.

The exhaust sets your tent to the room temp which you control. Easy in the right environment.

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The rh rose to around 35 on its own. Im happy with that lol. Its my light now thats the issue. Ive managed to get it to 85f/35rh. I feel like that temp is a little high. Cant lower it without either lowering the intensity (its already lowered to 90%), or having a tiny crack in window to bring room temp down. There is, however, a warm mist evaporative humidifier by passive intake. Ill switch that for a cool one first before any changes to light/window. What do you think. Ill add that i have a big fan blowing in tent (oscillating above canopy) plus a smaller, vortex type fan sitting on my light (blowing at the driver).

You could use a smaller light when you have small plants like that. A couple cfl bulbs is all you would need with 2 seedlings. Once they get bigger. Go with the big light.

Put the exhaust fan on a timer or better yet, a controller that turns the fan on when temp/humidity gets too high and shuts the fan off when temp/humidity gets too low. Place humidifier in tent