HELP need some advise!

These are about 12 weeks old. Next time I’m going to keep notes. I took someone’s advice and feed them every other week very diluted nutes. I was afraid to burn them. In the pic the 2 smaller nice green ones are a few weeks younger. I picked up a soil test kit to check the ph and nute levels I’m going to test it this weekend. But for now I was wondering if anyone knows off hand what might be happening to my girls? Can having the lights too close be causing this? I use a mars hydro 2000 watt led fixture two 4’ plant/aquarium fluorescents and two smaller generic plant leds. Temp is steady at 72 degrees and stays rite around 62% humidity.
 

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soil?

They look like they need to be fed much more often
I would start feeding them every week and try twice a week if it goes well after 2 weeks
Back off if twice is too much ?

They look thirsty, U are watering them right?

Maybe heat?

What's your temps?
 
soil?

They look like they need to be fed much more often
I would start feeding them every week and try twice a week if it goes well after 2 weeks
Back off if twice is too much ?

They look thirsty, U are watering them right?

Maybe heat?

What's your temps?
I wait for the soil to dry out completely then water till it runs off good.
Temp is steady at 72 degrees and stays rite around 62% humidity.
 
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