Plant curling, getting worse, need help asap

  • Thread starter Tris
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T

Tris

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Hello,
I need a bit of help with my plants, I see the leaves are starting to curl and yellow, specially the top ones.
My pH is around 5.8, tds after feeding (yesterday) was 950ppm.
The lights are pretty close, but they don't emmit much heat.
What could be happening, it is getting worse every day.
Thanks
20220525 093422
20220525 093434
20220525 093438
 
mysticepipedon

mysticepipedon

3,384
263
Looks like a potassium (K) problem. Since your nutes likely contain plenty of K, you might have some kind of lockout. The most typical culprits include calcium (I've you've tried cal/mag to fix this, it probably made things worse) nitrogen and phosphorus.

I know nothing about hydro, so hopefully someone with hydro cred will drop in and offer a solution.
 
T

Tris

38
18
Looks like a potassium (K) problem. Since your nutes likely contain plenty of K, you might have some kind of lockout. The most typical culprits include calcium (I've you've tried cal/mag to fix this, it probably made things worse) nitrogen and phosphorus.

I know nothing about hydro, so hopefully someone with hydro cred will drop in and offer a solution.
Thanks, do you think the lights could be the problem?
 
Cashmeh

Cashmeh

1,632
163
Dwc eh? Can we see your roots?

What are the ratios of each bottle and what bottles are you using?
 
T

Tris

38
18
Dwc eh? Can we see your roots?

What are the ratios of each bottle and what bottles are you using?
Yes, I'm not home rn but the roots look fine, white, no slime, no algae.
I'm from Argentina, so I'm using some national fertilizer that's marketed for hidro and Coco.
I have base A (macronutrients, with calcium and nitrogen)
Base B (micronutrients with mostly mg, Fe, B, MN)
And bloom ( for flower period, with P, K, and S)
I think I had my ppm a bit high at 900, so I lowered it to 750.
 
Cashmeh

Cashmeh

1,632
163
Yes, I'm not home rn but the roots look fine, white, no slime, no algae.
I'm from Argentina, so I'm using some national fertilizer that's marketed for hidro and Coco.
I have base A (macronutrients, with calcium and nitrogen)
Base B (micronutrients with mostly mg, Fe, B, MN)
And bloom ( for flower period, with P, K, and S)
I think I had my ppm a bit high at 900, so I lowered it to 750.
So you need to test your nutrients levels or do more frequent res changes. Your not adding enough of something and too much of something else. I can test individual ppm levels of the main nutrients individually.

Idk what deficiency that is but im sure someone else does.

So if you have no root uptake issues, add more of whatever these guys say the deffeciency is. My guess would be low potassium. Regardless. .get you something like what i did in the pictures.
 
Screenshot 20220428 132147
Screenshot 20220428 132207
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T

Tris

38
18
So you need to test your nutrients levels or do more frequent res changes. Your not adding enough of something and too much of something else. I can test individual ppm levels of the main nutrients individually.

Idk what deficiency that is but im sure someone else does.

So if you have no root uptake issues, add more of whatever these guys say the deffeciency is. My guess would be low potassium. Regardless. .get you something like what i did in the pictures.
Thanks, so you think is more of a deficiency than overfeeding?
I have people tell me it's over feeding, people telling me it's under feeding, too much light, etc.
So I'm in a crossroads rn.
Thanks
 
Cashmeh

Cashmeh

1,632
163
Thanks, so you think is more of a deficiency than overfeeding?
I have people tell me it's over feeding, people telling me it's under feeding, too much light, etc.
So I'm in a crossroads rn.
Thanks
Your green stems indicate that its not overfed. Generally the main stalk and fan stems go bright red all the way around when overfed.
Since your dwc, and only using like 3 gallons of nutrient water, with a plant that size, it will use all the nutrients you put in within a day.
 
Cashmeh

Cashmeh

1,632
163
Thanks, so you think is more of a deficiency than overfeeding?
I have people tell me it's over feeding, people telling me it's under feeding, too much light, etc.
So I'm in a crossroads rn.
Thanks
As for the light, your not giving it too much. Its not light burn. If anything by reducing light you stop the problem from exacerbating, but you do not eliminate it. By lowing your light levels all you do is slow the growth, of even the bad stuff.
After you make changes focus on the new growth. the old growth wont heal lol. Anyways. .so many opinions out there, but what you have to do is hear them all, and then adjust accordingly.
Generally when you give them to much light you get sunburn on the top of the fan leafs stems, making the top red, but the bottom still green. You have some, but nothing compared to me, and I never get light burn. Im running a 1000w HPS 12 inches away from nodes, and im still not getting light burn. As long as you have what it needs down below, and the enviroment is good up top, she will love the light.
 
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