Clones not healthy

I received 4 clones from a friend. I have only 4 grows (from seed) under my belt and they have all gone pretty smooth.
Current setup: hydro stones, 3 gal buckets, 600w led. Ph: was high 6.5-6.8 for a day or two, but have since returned it to 6.2. Ppm: 500. Using general hydroponics for food. Fed it 100% recommended “cuttings”, and also added some slf-100. Feeding/watering every 2 hours for 15 minutes. Lights 18/6

I’ve had them in there for 2 weeks now, with slow droopy growth. Leaves are starting to get crispy and very light green, with light brown spots.
I’ve had them in there for 2 weeks now, with slow droopy growth. Leaves are starting to get crispy and very light green, with light brown spots. I’m afraid to make any changes, not knowing what I’m doing.
I apologize if this has been answered and stickied 1000 times, I can’t seem to load all images, so I’m stuck reading other posts similar to mine.

thank you

I would double check your pH is correct for your grow style. I'd also move away from feeding these like they're cuttings and start feeding them like they're plants...they look hungry. Good luck.

veg pH should be 5.8, flower 6.0

what CC said, too

Thank you both for the advice.
Last night before bed I moved my light up about 10”.

my led light is brand new and I’ve only used hallide before.
They seem to be doing better almost instantly. I will lower ph today. And tonight maybe increase food to vegetation status?

thank you!!

Don't change to many variables at once, it will make it hard to find your true issue.

PrometheanLeaf said:

Don't change to many variables at once, it will make it hard to find your true issue.

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Thank you. I plan to keep it slow moving. Lights helped. After another 10-12 hours I will check all elements, lower PH to 5.8, then after another 24 hours I’m going to up the food.

thanks again.