need the bubble heads help!!!!!

ok guys i thought this was an mg problem, i might be wrong. please help i dont want to lose my first non bag seed crop. thank you all for any help..

https://www.rollitup.org/marijuana-plant-problems/235203-im-thinking-mg-problem-what.html

thats the post in the plant problems, if you need them i can put more pics in here.

wheres your ph and temps at, ied be willing to bet your ph is low.

Oh shoot, I just replied to you, but in the other thread you linked.