Is this light stress / heat stress? Or maybe too much IR using 730nm red leds

[Adi1989]

 

[HydoDan]

Looks to be nitrogen toxic.. Dark green leaves with a claw..

 

[70's natureboy]

They look weak to me, like they need more light.

 

[BBPac]

What are you feeding?
How much?
Temps?
Light height?
Light type?
Can’t tell you when you don’t give any precursors

 

[welshsmoker]

Lift your leds a bit , flush with clean water twice, then double a and b twice a week.

 

[Adi1989]

Looks to be nitrogen toxic.. Dark green leaves with a claw..

Got you might be the cal mag then as that has Nitrogen in it as it’s Calcium nitrate

 

[Adi1989]

Lift your leds a bit , flush with clean water twice, then double a and b twice a week.

Ill give that a go, the run off is about 1500 ppm but Im feeding 1000ppm

 

[Adi1989]

What are you feeding?
How much?
Temps?
Light height?
Light type?
Can’t tell you when you don’t give any precursors

House and gardens line
1000ppm
Room temp is 27.5c
nighttime its about 24c
1 meter above the canopy
4000k Quantum boards about 400w per plant and added 660nm about 80w per plant

 

[Adi1989]

They look weak to me, like they need more light.

Its quite a bit of light 27000 lumens at the tops so about 800par

Looks to be nitrogen toxic.. Dark green leaves with a claw..

does nitrogen toxicity stress out the plant or make it weak?

 

[Rurumo]

I'd lower the ec of your nutrient mix to 1.2, water to plenty of runoff to wash out all the built up salts. It won't fix those leaves, but any future growth will look better.