too much light?

hey brozzas

i got few plants on 6th weeks of veg, in 8l coco+30% perlite (a lot of aeration) pots, under 4 quantum boards (480w total).distance between top of plants and boards are +- 30-40cm.
i noticed, that plants that are just under the light curl their leaves , while plants that are further ( 50-70cm from lights) are ok.
can this be a lot of light problem? i feed them all with the same nutes, 500-600 ppm all the time(this is 100% notoverfeeding). ppm from drainage 700 (+100 from intake).
any advices guys?

More questions lol
Is it an HLG 550 light? Is it on the full 480 watts, can you dim it?
You say in veg, how many hours is the light on for?
What area is the light covering?
Are your room temperatures ok?
Sounds as if the light is too close to me.
Raise the light to 60 - 70 cm away and keep an eye on them to see if it rectifies the leaf issue

Looks dry, thirsty, very overfed or ph locked out to where it refuses to consume anything, or you have drowned it and have nothing to drink water.

What PH? Do you fertigate to 20% runoff? How often? Looks like salt buid up causing lockout..

ProPheT 216 said:

Looks dry, thirsty, very overfed or ph locked out to where it refuses to consume anything, or you have drowned it and have nothing to drink water.

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They are not overfed, just too much light / heat.

looks like calmag deficiency, typical in coco. also looks oxygen deprived. did you filter the peat when rinsing and did you buffer the coco? how often are you feeding when you get +200ppm runoff? as mentioned could also be lockout from overfeed.

Moflow said:

More questions lol
Is it an HLG 550 light? Is it on the full 480 watts, can you dim it?
You say in veg, how many hours is the light on for?
What area is the light covering?
Are your room temperatures ok?
Sounds as if the light is too close to me.
Raise the light to 60 - 70 cm away and keep an eye on them to see if it rectifies the leaf issue

Click to expand...

HydoDan said:

What PH? Do you fertigate to 20% runoff? How often? Looks like salt buid up causing lockout..

Click to expand...

Greenman68 said:

looks like calmag deficiency, typical in coco. also looks oxygen deprived. did you filter the peat when rinsing and did you buffer the coco? how often are you feeding when you get +200ppm runoff? as mentioned could also be lockout from overfeed.

Click to expand...

also what is your ideal date? what color are my eyes? how much wood would a woodchuck chuck if a woodchuck could chuck wood? and does that come in beige?

Had the exact same look yesterday. Tried to go nuts with with my reactor.

50cm at least or 700 umol/s top if you wanna keep it tight and efficient.

sh0wtime said:

They are not overfed, just too much light / heat.

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That would cause a taco and burning. Your issues are more than just heat and light

ProPheT 216 said:

That would cause a taco and burning. Your issues are more than just heat and light

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I didn't do a thing besides goin from 1100 to 900 umol + watering and the babes are happy.

sh0wtime said:

I didn't do a thing besides goin from 1100 to 900 umol + watering and the babes are happy.

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Just water?

Ignoring all the text, the pic looks like a watering issue (over/underwatered or moisture problem). You know it's a lighting issue when there is chlorosis. I don't see that... I see leaf spotting and other issues. Gotta drop the humidity and shit.

ProPheT 216 said:

Just water?

Click to expand...

also gave 'em a shot of brawndo and pee from a vegan mountain goat.

Oh man, thanks to everybody!!! i didn't enter few days, cause first day only 1 person answered, so i follow his advice - i raise up quantum boards ,and guess what? PLANTS ARE NORMAL GREEN COLOR NOW ,WITHOUT ANY SIGNS OF TROUBLES!Everything is fine, coco is buffered ,mixed with 40% perlite to even more air circulation, every time i fed em with 30% run off, EC IN 1400, EC OUT 1500, PH IN 6.0 PH OUT 6.7 .looks ok, right?

after i posted this thread, they doubled in size