Issues in flowering

I'm writing on behalf of a friend--he's at F40 and these are his plants.

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About a pound

bk78 said:

About a pound

Click to expand...

Hahaha my bad I'll try reposting the images

https://imgur.com/a/tihPs4c Plant #1
https://imgur.com/a/XXGTRT6 Plant #2

Both are the same strain, two phenos I believe

More details:
he's using coco loco in fabric pots
Lighting is migro300, migro400, HLG600
8x4 tent
He's been struggling to keep humidity under 60%
Also running co2

Your friend has issues with Mg and Ca...