deficiency or ph problem? Help

[Lung508]

I have these 3 tall skinny girls in coco 2 garlic sherb 1 GMO. to start, coming close to flower the leafs on the g sherb started to purple, i had lowered the temp about 10 degrees to get some color so it seemed normal, 2 weeks passed and they seem to have stalled, iv been flushing with balanced water and leafs are starting to crisp up, trichs are still transparent and just tried pulling my lights away a few more inches to see if it helps... second my GMO(last picture) seemed to have slowed A LOT mid flower and is still going at a snail pace as well as leafs turning yellow and purple. Appreciate any help thanks

 

[Jack og]

Any bud rot?
Middle pic I thought it had the signs of rot, spread the big apart and check?
But it’s stalled for sure.

 

[Lung508]

Any bud rot?
Middle pic I thought it had the signs of rot, spread the big apart and check?
But it’s stalled for sure.

Dont see any and i have been checking, ill give another close look tomorrow and update