To change the light cycle, click the “lighting” icon on the main screen and scroll down. You’ll see a Cycle Schedule section with a pen icon. Click that icon and you’ll be able to edit the on and off times.
Here’s a VPD chart, which will enable you to judge your temp and RH:
@Venturi…thx brother. That makes it much easier. Seems to be getting itself worked out. I’ve let the Wedding Cake go another day without water. It was a little damp and I wanted to add nutes to it so I decided to let it have another day. The Moonberry Kushrocks I’ve watered using Deer Park spring water without anything. It’s day 17-18 for the Moonberry Kushrocks. If I can remember correctly, you said it’s easier to control VPN by increasing Rh. Right?? Even though it tops 70% Rh inside the tent when I turn on the humidifier set to 50%?? Doesn’t the E6 rotating fan increase Rh??? Should I move it to a different corner (fan)???
Your recent runoff checks showed that neither plant needs nutes yet. Why are you keen to fertilize the Wedding Cake? It makes no sense.
I said that I manage VPD rather than managing temp and RH separately. VPD is a function of the other two, as you can see in the chart.
The way I do that is by running an AC Infinity T3 humidifier in my tent with it set to maintain a VPD = a value I choose from the smaller chart. I have a twist tie and rubber band that hold its temp/RH probe together with the 42A’s probe, so they sample the same spot.
As the temp in the tent changes, the T3 adds humidity when needed to maintain my VPD target. If the humidity becomes excessive (i.e., the VPD is too low) the exhaust fan lowers it. I never turn my exhaust fan off. It’s always running at least at its lowest speed.
Circulation fans even out temp and RH pockets that can form in the tent and around the plants. They have no other effects on temp or RH. Yours looks positioned fine to me. As it oscillates past, you want to see the plants wiggle a bit. It strengthens the stalks and stems.
If you mean to transplant the Wedding Cake to a 5-gallon grow bag, what are you waiting for?
@Venturi…I downloaded the VPN chart and forwarded it to my email so I wouldn’t lose it. I zoomed in the chart and see that the VPN rises with humidity rising?? Seems like you add rh to the tent and it helps manage and lower VPN. Am I right?? This whole time I thought by turning on the humidifier it’d raise the rh inside the tent above 60% and I was under the impression the ideal rh was 40%-60%…my confusion lies with that.
@Venturi… Hello my friend. I’m very scared to transplant the Wedding Cake from it’s plastic pot to the fabric pot. The thought of it dying now terrifies me after what she’s been through. I was wondering. Since the biggest problem is water retention because of the limited drainage holes can I add holes to the plastic pot to accommodate drainage instead?? I understand now the VPD and it’s reasoning. Totally understand and that is a good feeling because I was totally lost until I read closely on the chart and zoomed in enough so that I would. I turned on the humidifier and it’s maintaining the VPD right at 1.3…
By controlling the VPD, you automatically get the right RH for the current temperature. The smaller table above the VPD chart shows that 1.3 is a bit dry for the stage your plants are in. Not a big problem, but I’d bring it closer to 1.0 if the humidifier can do it.
You can minimize transplant shock by loosening the soil along the sides of the pot with a knife. The idea is to remove the plant with its roots and all the soil together, like taking a muffin from a muffin pan. (It helps if the soil is moist.) Make a correspondingly sized hole in the grow bag soil and drop the plant with its soil in.
The Wedding Cake may look unhappy for a few days, but it’s unlikely that you’ll kill or seriously harm it, and it will be grow better in the grow bag.
@Venturi. I’ve got the rh right and the VPD adjusted well for doing so.
Notice the environment now.
Your temp, RH, and VPD look perfect.
It appears that your 6" circulation fan is plugged into the jack for the exhaust fan. Suggest plugging it into the intended jack to avoid possible confusion, later.
Setting that fan at speed 5 may be too high, judging from the photo that shows its location, relative to the plants. They should wiggle gently as the fan swings by (it should be set to oscillate back and forth). If that’s what’s happening, though, 5 is fine.
Having a fan blowing at the two lower, circular ports will help ventilate the tent if there’s at least one open port up top. The purpose of ventilation, though, is to provide fresh air and CO2 – not to dry out soil. The plants and normal evaporation will dry the soil just fine. Why do you think speeding that process up is a good idea?
Your next purchase should be what’s needed to use Photone. Given that a ream of paper costs roughly $10 and the Photone diffuser costs $26 and gives more accurate results, I’d order the diffuser if I could afford it.
Yes, a 4" inline exhaust fan should be your 2nd next purchase. It will give you much better control of the airflow through the tent. You won’t need a carbon filter for it until the plants are flowering. With only two plants, you may not need a filter to reduce the odor even then.
Have you elevated the pots so they aren’t sitting directly on the saucers? You’ll want to do that before watering again. The plastic bucket, in particular, can’t drain properly like that. Punching more holes in it will let it drain better, once it’s elevated.
@Venturi. Yes then. A diffuser and a ream of what was the paper weight? 25?? I can’t remember. Well at least I know which one I need asap instead of worrying about the inline/exhaust system. I’m trying to imagine how to raise the pots and still have a catch pan underneath to get runoff. I’ll take any ideas. I thought a milk crate that another person used was brilliant but how do you aquire such?? Should I make sure all wetness such as a towel I use under the humidifier to catch any water from the top fill when adding water to the tank?? Sometimes it gets wet and I don’t remove it. Does that affect humidity??
You don’t need both. Buy either Photone’s diffuser or 22-lb paper.
You need to elevate the pots in two ways:
Add risers so the pots drain into the saucers, rather than soaking in them. See my earlier post for an example.
Lift the Wedding Cake, saucer and all, so it gets the higher amount of light it needs. A cardboard box will do.
Spilled water in the tent will evaporate, but your humidifier can be set to maintain a constant RH. It will reduce its output to compensate, so no worries there.
@Venturi. Yes indeed. A diffuser is the answer. And I have plenty of Amazon boxes I’ve saved that are going to be perfect. I’ll maintenance what I’ve got so far except diffuser which I’ll get in the first week of December and I’ll elevate the Wedding Cake with a box or a medium size bucket my dad has around here. I think all those improvements will do the trick.
Good plan. The most important thing that’s missing at the moment is a way to measure the light the plants are getting. The Photone diffuser will fill that square nicely.
@Venturi. One more question before I kick back and watch a movie…should I switch the humidity from cool mist to warm mist during the night? The VPD dropped to .7 and I was wondering?? I’m under the impression that if I heat the mist overnight it’ll cover that issue through the night…
A VPD = 0.7 is within range according to the chart and the plants’ ages.
I’m not sure what difference warm vs. cool mist makes to a plant. (Humans, maybe. I’m not sure that Vivosun model is meant for use in a tent.) I suppose warm would raise the tent temp a little.
By “that issue,” do you mean the temp drop during lights out each night? If so, I suggested a solution in this post.
Hope you enjoyed the movie! 
@Venturi. Yes. That “issue” was explained by questioning the validity of warm v cool mist inside a grow tent. I can’t think of no added benefits one way or another except for humans. Lol…I didn’t think about how the VPD compensates with temperature fluctuations during light off hrs. I should have paid more attention to the chart. I look at the chart and will be prepared this evening. I’ve looked at the Wedding Cake and notice new growth as well as the Moonberry Kushrocks doing it’s growth spurt so I’ll update pictures after coffee and the news. The Wedding Cake’s leave are beginning to bounce back and I can actually see how it’s using lower leaves for the nutrients they provide. On that plant I’ve been consistently trimming the lower leaves closest to the bottom when they look like they’ve been used up. Seems to be working for now. I certainly don’t understand topping or supercropping so I’ve not even thought about that process. Anyway, thanx and the series I’m watching is American Horror Story which is actually fairly good. Weird at first but grows on you. Don’t work too hard this week it’s a short week. Holiday!!!
It would if your humidifier could be set to hold VPD constant. I believe it lacks that feature – it can only hold RH constant. That’s why I said that model doesn’t seem to be designed for use in a tent. It has a place to add oils for aromatherapy, doesn’t it? That feature is useless for plants.
If you want to learn about cropping your plants, How to Yield More Articles - I Love Growing Marijuana is a good place to start. Indeed, this site has many useful guides. You can find them by scrolling to the top of a page and clicking “Grow Guides.”
@Venturi…thanks brother. I’ll read up on the practice of cropping and no sir…No place for aromatherapy and I can set the rh from 40%-95%, unfortunately its not the one vivosun had for $150. so it doesn’t offer a VPD setting. Does AC offer one maybe a bit less expensive? Or anyone for that matter?? The one I mentioned that I didn’t get was compatible with my E42A hub. One thing I’ve noticed is the hub doesn’t show the same reading as the app. Both the app and e42a vary by 3°F, and rh% +/- 3-5%?? Have you or have you heard anyone else say anything similar to this problem?? Thanks brother for the excellent help. Also I noticed that the Weddington Cake is holding steady w/ rh and VPD readings since I’ve raised its height about 12". Same thing with the Moonberry Kushrocks. Right on there my friend. I’ve been thinking about buying a new 200w Aerolight to replace the one I have, once I research the measurements so I can assure that it’ll fit.
@Venturi…no sir I’ve gotten maybe a little bit better than the aromatherapy humidifier. It’s got a rh setting feature but unfortunately it doesn’t have the VPD setting. I’d like to get the one on vivosun for $150 but not now, maybe one day. It’s compatible with the E42A hub. Do you know any alternatives that might be a lot less expensive and still offer the VPD feature? Also, thanks very much for the info on cropping. I’ll definitely read up on it. I don’t think I’ll do it but I’m just confused about when to crop and where. And does the practice have benefits for an autoflower? I’ll read the articles on ILGM. Oh yeah, another query, my E42A hub varies from the readings I get from the app. Have you heard anything about this before?
The most likely reason for a discrepancy between the temp and RH the E42A displays and the values you see in the app is that one is displaying the outside values and the other is displaying inside (the tent) values. Please check and let me know.
Unfortunately, none of the Vivosun humidifiers appear able to maintain a VPD setting. The AC Infinity T3 that I use is $48 on Amazon, presently. That’s $10 less than its usual price; don’t know if the Black Friday price will be any less.
You may be able to offset the cost of a different humidifier by returning the Vivosun for a refund. Have you had it more than 30 days?
As for buying another light, I suggest holding off on that unless/until you know you need to. We can’t determine that until you get the Photone diffuser.
Meanwhile, looking at the PAR map for the A100SE, I suggest hanging the light 12 inches above the Wedding Cake with the plant at the center and setting the intensity to 72%. That should give it roughly 600 PPFD. Put the Moonberry next to it. That should give it roughly 300 PPFD.
I believe it’s been 4 days since the plants were watered. Is that right? How does the weight of the seedling compare to a 5-gallon grow bag filled with a comparable amount of dry soil?
Hello my friend @Venturi…sorry for such a late reply. Holidays!! Family fun!! The E42A does show the current inside and outside temperature/rh, as well as the app. confusing to me at first but I think as an afterthought I double checked and am certain I got that right the one other thing I haven’t figured out is how to set warnings on high/low temperatures and rh on the app or E42A?? There’s the only thing I’ve noticed is it’s auto set to 60% rh too high and 35% rh too low as well as the app…any familiarity?? I’m under the impression that you favor AC…I’m definitely in favor of this AC T3 humidifier especially the price that includes the PPD setting. Awesome!!! Nope…it’s not the humidifier from the smart controlled system but it’s Vivosun unfortunately I’ve had it longer than I thought so no worries. My budget for the 1st week of the is about $150…hopefully less. And yes indeed, I’ll adjust the intensity and adjust the measurement to 12" above Wedding Cake. If I remember correctly I’ve already got the seedling set to 13 maybe 15" below light so the PAR will change but the PPFD won’t…Lol!! See?? Your advice has left me with knowledge I wasn’t interested in back in High School. Who’d of ever thought 
…Yes it’s watering time for the Moonberry Kushrocks, straight spring water and how about the Wedding Cake?? Ph’ water? It’ll be 5 days tomorrow morning and it’s my care and maintenance wellness check…I will take pictures and give me your thoughts…thank you my friend.
