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Give her a flush a few times then wait a couple days then feed again. I'm growing the same ones have a gander. I use Coco coir and just feed every 2-3 days. Have you checked your salt content too? And if humidity is a problem grab a bigger extraction fan and try cool the room down with aircon or make a portable aircon out of a styrofoam box, plenty of youtube vids for that and failing that grab one of those big tubs that suck the water from the air, over here they're called damp-rid.
On another note if your 4 inches from your light try lifting it higher or super cropping your plants.
@Ferenc, thanks idk what happened.
I'm thinking now go get calcium bag and tomorrow put the powder on base and then water it, I have already watered today. Grrrrr. Sad