hard time figuring out issue. pics please help

hi everyone. i have a 3 week old n

othing great bag seed growing. its under 400hps light as of two days ago. ph is fine. temps all that stuff is fine. noticed upper leaves and new growth are yellowing and scrunching up. have no idea what it could be. i did find a carpet bettle on it a couple days ago not sure if that was the cause. it was yellowing becore i found it but worse now.. thank you

Have you been feeding yet? No expert but, maybe a shot of cal-mag? Ask around, some folks should be able to pinpoint the problem. Overall it looks pretty good. Good luck.

No nutes yet this will be the first week. i will look into the cal-mag thats what i was wondering. thank you for the input!!