What is it and how do i fix it?

  • Thread starter Lebnator
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Lebnator

Lebnator

16
3
Hey everybody.
New to hydroponics(dwc).Started a couple seeds (skunk autoflower). Both plants same conditions, only one showing problems, basically since the beginning.

PXL 20220109 173532250
PXL 20220107 001240565
PXL 20220107 001230066


PXL 20220107 001222559


This one seems happy

PXL 20220107 001236022
 
Dirtbag

Dirtbag

Supporter
8,655
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I have a general idea, but need more info. Tell us everything.
 
Lebnator

Lebnator

16
3
Light- phantom pheno 440 at 40% intensity and 4' away

Nutes- general hydroponics 3 part at about 1/2-3/4 strength, cal/mag supplement.
Water from well treated with uv and filtered, comes out after adjusting ph to 5.8 ish, to about .3 EC.

-Air Temp stays at 72F all the time

-Res temps 68-70 at most

-RH probably a bit it low at 35-40%

*also starting to wonder if didn't prep rockwool cubes properly....too high ph in cubes?
 
Dirtbag

Dirtbag

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Nah rockwool all comes ready to use now, looks like environment. Get the temp up closer to 78-80f. And if possible get the RH up a bit.

Also "strength" doesn't mean much, do you have ppm/ec numbers?
 
Lebnator

Lebnator

16
3
Thanks for reply,
Will bump up temp in room right away. EC of nutrient solution at about 1.5 (750 ppm) and 6.2ph currently.
If caused by environment wouldnt both plants be affected?
Also the affected plant stretched quite a lot compared to her sister when sprouting.
 
mikeross

mikeross

413
43
@Dirtbag is correct... get temps up to 78 min, keep an eye on your bucket temps as they may rise too. Get your humidity up too. I'd shoot for 60-65% but that's for my strains/room.

4' distance with a 440w led @ 40% probably isn't giving them enough light either. I'd slowly raise up the intensity, which should also increase your room temps a little. If I ran my 650w led light 4' from my canopy at 40% strength I'd probably be hitting around 200ppfd or less.

Once your plants perk up after you raise temps/humidity, will take a few day days to correct, I'd either lower my light or increase the intensity or a combo of both.
 
Lebnator

Lebnator

16
3
Just an update if anybody cares. Raised temp in room to 79. Got humidity up to 55. Lights a 60%. Bucket temps up to 75 now though. Gotta get that sorted quick. Plants have perked up and grown quite a bit for just a day or two. Problem with spots on older leaves still getting worse and starting to show on next set.
PXL 20220112 030919102
PXL 20220112 030912246
PXL 20220112 030855870


Her sister seems ok.

PXL 20220112 030826638
 
Dirtbag

Dirtbag

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Give it more time. Keep it steady, I think it's coming around. Deficiencies won't repair themselves immediately, it's like bringing a ship around, make an adjustment and see where it settles before changing shit up again. I think you're on the right track.
 
Lebnator

Lebnator

16
3
The start of root rot? Or something else...
Res temps 76F
PXL 20220113 004559236
PXL 20220113 004628017
PXL 20220113 004645687

Looking a little better
PXL 20220113 005010445

Looking a lot better
PXL 20220113 005014957

Moved air pump to outdoor air. Should help with bucket temps.
 

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