Major leaf crisping on day 49 of flower.

What’s your best guess at a diagnosis? All of my other plants, same strain, being fed the same Advanced coco pro line, are looking great. But this plant is by far the biggest, has much slower growth in the buds, and now on day 49 of flower, she looks like this. Leaves are so crispy. I’m flushing it now. But what do you gues think?
PPM 1000.
PH 6.2-6.5
HLG 600R

5g pots. Water every other day until I get 20% run off and they all have loved it thus far.
I’ll attach pictures, as well as a few of it’s sister plant for comparison.

thanks for looking!

Are u giving additional Cal/mag?

Looks good otherwise doesnt look like a major deficiency yet.

MintyDreadlocks said:

Are u givingadditional Cal/mag?

Click to expand...

Yes, at 2 mil per gallon. Think i'm having a lock out? just baffles me that all the others are doing so well on the same feeding. But i've learned to expect less from seed sisters.

I'll post better pictures tonight with the lights off.

it's in coco?

looks fine maybe slightly overfed pH might be a little high but i'd just keep doin what youre doin

I would think for sure it’s one of these on the excess side

Looking like a magnesium def/ lockout.
FF

Would check ya ph first . Then drop ya ec abit

Chech your runoff EC ,see if thats a lot higher then whats going in.