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Having problems with my tent.

Ez Rider

Active member
Veteran
I've been growing in a sunhut, and having various unidentified problems over the course of several grows. My sunhut is one of the older, silver lined models, with green trim.

Every grow in the tent seems to start out strong, then tapper off.
Yesterday I did a marathon transplanting session.The first several plants got moved outside, because there wasn't any room in the tent. After several hours outside, I went to check on the plants, and I was surprised to see that they had perked up considerably once moved outside.

I think part of the problem is that I've had the house shut up tight because of the heat. The tent is in the air conditioned part of the house, and has been closed to the outside for a few weeks. I opened up the house, and kept it open all night. The fresh air did seem to help the plants, but the ones that spent the night outside look WAY better.

I have good(I think) ventilation for the tent. A 6" maxfan, pulling through a can66 to exhaust hot/stale air, and a 16" oscillating fan for movement. I was running an intake fan as well, but is was causing problems. The exhaust fan seems to work fine by itself.

Normally, I have the house open to the outside, but this summer has been stupid hot. I seem to experience unidentified problems either way, but it's more noticeable with the house all closed up.

I'm wondering if my problem is air movement, of if maybe I have a "toxic" tent. Here's the indoor plants:
picture.php


and the outdoor:
picture.php


Remember, all these plants were in the same tent until yesterday afternoon. The outside plants were re-potted and placed in the yard. They spent the evening outdoors, while the inside plants went back in the tent. I made sure the room the tent sits in had strong air exchange with the outside, all night long. I've still got the house open at the moment. The outside plants are all "reaching" for the sun, while the indoor leaves are flat and listless.

Is there a way to tell if it's lack of co2 or something worse? Any ideas???

I need to solve this, as I can't put all the plants outside.
 

Ez Rider

Active member
Veteran
I've become pretty sure that the problem is not enough co2. The plants I moved outside continue to improve, the plants i kept inside, in the tent are improving slowly, now that there's airflow throughout the house. The inside plants still won't "reach" for the lights though.

I'm going to pick up a co2 test kit from the garden store later today. Check my inside/outside co2 levels. I'm also seriously considering buying a co2 generator and controller. The tent(5x9) sits in 16x16 room. I could keep the house closed, and enrich the entire room to 1500ppm co2. The constant exhaust in the tent should draw the co2 rich air through the tent. There's a wall furnace in the room I can "t" off, for natural gas, and everything I've read says that levels below 2500ppm are completely safe for occupants. I don't want to spend more $$, but I do want a good crop.

The store doesn't open till noon, so I can think on it awhile.
 

stoned-trout

if it smells like fish
Veteran
out gassing will kill them... I had 2 bad tents....the original and the replacement both bad.....think most have solved that issue by now....highly doubtfull its lack of co2...
 

aridbud

automeister
ICMag Donor
Veteran
You need intake of air moving and out take as well. Has nothing to do with 'silver lining'....my opinion.
 

BushyOldGrower

Bubblegum Specialist
Veteran
I have never used tents and I also doubt that this is co2 depletion.

Have never liked tents actually. The transplant you did and the outside environment sure helped but your plants don't look bad at all really.

Why not just use a large closet or a whole room?

I realize we all work with what we have. Hope you do well. Bog
 

BushyOldGrower

Bubblegum Specialist
Veteran
You know what? Maybe in a tent without enough intake co2 would deplete.

I do run a co2 burner in flower only. Shoot for 1200 ppm.
 

Ez Rider

Active member
Veteran
out gassing will kill them... I had 2 bad tents....the original and the replacement both bad.....think most have solved that issue by now....highly doubtfull its lack of co2...

Were either of your bad tents the "silver lined" style?

You need intake of air moving and out take as well. Has nothing to do with 'silver lining'....my opinion.

The max fan pulls ~300cfm from the tent, this creates plenty of in-flow. Fortunately, the worst of the summer heat seems to be over, and I'm able to leave to room itself open to the out side, all day.


I have never used tents and I also doubt that this is co2 depletion.

Have never liked tents actually. The transplant you did and the outside environment sure helped but your plants don't look bad at all really.

Why not just use a large closet or a whole room?

I realize we all work with what we have. Hope you do well. Bog

The transplant itself didn't have much to do with the improvement. Un-transplanted plants, still in the 1gal pots had the same response.
I'd like to just use a room, but I'm living in what amounts to a glorified studio, and my options are limited.
 

trichrider

Kiss My Ring
Veteran
did you say they ALL were in that tent together?

i counted 34 in those pics above and they looked bigger than 1sqft each....overcrowding?
 

Ez Rider

Active member
Veteran
It's been a busy week, but I'm back, and my plants are looking pretty good.

My doubts about the tent finally got to me, and I opted for a new tent. I can't say 100% that the old one was "bad", but I just couldn't shake my doubts. In any event, the old tent was pretty poor quality. Lots of little light leaks, CRAP zippers, and just overall shoddy workmanship. The new tent is quite an improvement, although tearing down/setting up was quite a chore. I'm not advocating tents, but I bought the gorilla brand, and I'm glad I did. The plants have perked up considerable since the change. Was it opening the house back up? Was it the new tent? Something else? I don't know for sure, but the plants are looking happy.

I must say that my veg tent(grolab) was doing fine in my closed room UNTIL I moved it right next to the old flower tent. The veg tent was on the opposite side of the room, and doing fine. When I put it next to the flower tent(a space saving move), slow growth and other small problems started to pop up. My newly potted clones, which weren't doing well, began healthy, new growth immediately after I replaced the flower tent.

I'm working on getting some blumat drippers installed today. Watering is really eating up my free time. I flipped to flower, and the lights are off, so no pics till later...
 

Ez Rider

Active member
Veteran
How many watts? And what's the temp/hum inside the tent lights on/off?

2 1000w hps. hi 70's and ~50-60%rh lights on. hi 60's to lo 70's lights off and 60-70%rh. I'm getting a bigger dehumidifier from a buddy this weekend.
 

Ez Rider

Active member
Veteran
It was that POS sunhut:moon: I replaced it with a gorilla tent, and 1 week later, my plants mostly look really good. Better than they ever did in the old tent.
picture.php


I was also having problems with the veg tent(grolab) AFTER I placed it next to the sunhut:moon: Those problems have all disappeared since the sunhut:moon: was banished. No other changes were made to the veg, just removing the tainted hut. Moral of the story: Don't EVER buy a sunhut:moon:.
 
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