I maybe be wrong but is the fan possibly to small for the size of the tent to create a vacuum? The tent is 2x4x6 an these are the fan specs
2 Likes
No that would create vacuum, if there is less air than being forced in(another fan). If you remove the fan from your filter do you feel air blowing on you or does it suck you hand to the fan? Or take the hose part off and then it should be sucking your hand in.
1 Like
well, in your original configuration, it had enough vacuum to pull air thru the carbon filter, and blow to an unrestricted exhaust.
Now its got an unrestricted intake, and pushing air thru the carbon filter. If it couldnât do the first (above), then it couldnât do this, but I know it can 
Donât think of it as a high suction vacuum, its a 4" duct after all. If you blow smoke towards the duct from in the tent, it gets sucked out, yes? (then blown into the carbon filter)
My 4" fans arenât much different. If you close ALL other vents, you WILL see the vacuum as your tent walls will suck in much more than you thought they wouldâŚ
1 Like
I dunno what it showed me but I ran a experiment lol as @Nagel420 said when I close up every port and screen I did achieve a tight vacuum. With the back screen open only was is still had a small vacuum, when I open a large port on top where I have a fan it blew up again. If I donât use that fan my only intake is from the small oscillating fan on the ground, is that enough or will I have to experiment more?
1 Like
You donât want intake/fresh air coming in from the top of the tent. All from the bottom underneath the plants sucked to the top and out. Yes you can use only the one fan. And then the oscillating fan for extra air movement.
1 Like
I took the fan out of the top an closed the port. Opened one of the little screens on the bottom, will try the bigger screen tomorrow to see if it changes. I did this about an hour ago, it dropped from 79 to 76. My Marshydro led is running high (no dimmer) an the other led is running at 75%. The exhaust fan is running on high
Definitely seeing some progress lol thank you @Slammedsonoma420, @Nagel420 an @crunkyeah for the help so far 
3 Likes
What it seems was happening, the fan in the top port was acting as a downward mixer, instead of letting the heat rise so it can be exhausted. It was blending the warm tent air with the air it blows in, distributing it around the tent for an overall temp raise. It also seems like that fan blowing in might be more CFM than your exhaust fan (since the exhaust fan canât keep up the tent âballoons upâ).
I let my intakes be passive (no fan pushing in), and exhausts powered via fan. LEDâs donât make much heat for us to get rid of compared to MH / HPS bulbs.
3 Likes
Great news, I think we finally got it correct! With both lights running high Iâm now able to keep the tent at 76. The only thing I could think of that may improve it more would be getting a better oscillating fan
3 Likes
I know youâve got it sorted, but just for clarity. Hot air rises (duh we all know that), so you want to pull out the hot air from the top, and you want all your air intake near the bottom. If you have an extra intake at the top, it will shortcut the rest of the tent and just go right out the other hole at the top, and defeat or hinder your lower intakes. Iâd seal everything up except the intakes as well as possible especially near the top. You donât have to go crazy.
I apologize if this is all obvious haha. I always get frustrated picking up stuff bit by bit with no reasoning for it 
3 Likes
Hey there Heather, I had this before on one of my plants and after lots of reading around I found out that it is called Guttation. Unfortunately, as the sap is primarily composed of simple sugars, water and minerals, not cannabinoids and terpenes it has no active properties.
From memory it tasted of burning sugar when a bit made its way into a joint - a real shame, I thought I had hit the gold mine - a plant that handed out Rosin for fun 
5 Likes
I get guttation on the edges of fan leaves, outdoor at night, after watering. Starts forming as soon as the temperature drops.
In veg itâs fine but not flowering. 
1 Like
Iâm struggling to get a better picture but whatâs the thoughts on this, is she ready or soon or be?
Donât mind the dog hair it all blows into it outside 
Edit - this will be my first large harvest, Iâm wondering if drying in a uninsulated shed would be a bad idea? I could find room in the house if necessary
4 Likes
This one Iâm also unsure about. Is this fall coloring or something else? Sheâs got so little trichomes that Iâm unsure how to tell when sheâs ready. The yellow leaves pluck off easily if that helps
5 Likes
I experimented with removing the white fan for the green one to gain floor space but it wasnât strong enough to keep it cool. Beyond that the autos are doing good, three started flower today
8 Likes
The yellowing is a nitrogen deficiency. Nothing to do with fall.
Do I bother trying to treat at 8 weeks flower?
1 Like
No for sure not. Just let her finish up. Everything looks good!
2 Likes
soon-- wait for the trichome color to start turning golden/amber & when itâs 1/2 & 1/2 âripeâ to un ripe then CHOP!!! 
The house is probably better. Ideal temp & RH are hard to achieve (low 60s F & 60ish%) but thatâs the target. I personally favor humidity over temperature & so I lose terpenes/smell due to heat(I canât avoid 80F inside at day) & get the âhayâ smell. 
It subsides but the loss of stinkiness sucks.
Learning to dry & cure is like learning to grow & takes practice to get experience. After a few youâll be able to ID what is too âwetâ or green to be stored/cured & whatâs perfect.
Checking it every day or two or 3 helps to ensure the curing is going right.
If itâs perfectly dry enough to smoke, then itâs a little over-dried for curing & long term storage. If itâs got the slightest bit too much moistureâjust barely! 
then itâs PERFECT for vacuum sealing & storing.
Very generally speaking, based on your latitude(sorry-- I know youâre not in Canada or Mexico 
), youâre probably about 3+ weeks from harvest. Did you happen to notice the date when they began flowering?
The yellowing (while technically âchloroticâ or lacking N) is called âsenescenceâ & is very similar to âfall colorsâ. Nighttime temps below 50F often cause purpling or the expression of anthocyanins, the same in âfall colorsâ on trees. 
Do not feed it nitrogen-- itâll probably freak out & âhermâ or sprout male flowers & self-pollinate.
I clear away the easily detached/almost off flowers & remove them from the area just in case they have an aphid or spore or some crap. I.e. compost pile.
3 Likes
So itâs kinda normal for them to yellow? Sheâs the one I bred so Iâm hoping to be able to finish it out okay. They started flowering around 8/8
Iâm up in the mountains of northern Nevada, itâs starting to get cold at night but staying staying above 40 for now. I do have three in ground so the weather better continue to cooperate lol
5 Likes
Around here we get overnight dew which is an issue and will cause or encourage problems. If you can keep the shed temperature at least one degree warmer than outside, that will prevent overnight condensation. I have done it out of necessity and it worked but wasnât ideal, with a small electric heater set to barely add heat.
The yellowing is normal when they get near the end, no problem. They donât always do it, but itâs common.
2 Likes