Areogrow Garden Newbie Grow 2 and 3 unknown

This is my 2nd grown attempt after getting non-mj seeds from my first vendor.
This strain is unknown by I am assuming that this plant is a sativa and I am 5 weeks into 12/12 flowering with a 400w lamp air cooled with a carbon filter and inline fan.
I am doing this in an areogrow garden (which was a bad idea because of the amount of room the roots need). I vegged for 4 weeks and and then switched. The largest plant doubled in size and is now hitting the light which I can not raise any higher.
I will take some close up shots later with another camera, but the colas are forming nicely and I am trying to determine how much longer it will take before I harvest.



This is the second plant in the tent and it is not doing well at all for the last 2 weeks. Not sure if I should put it out of its misery and cut it down or continue to see if it turns around. If I do cut it down, can I cure it and use it for an extraction like butter or BHO?

That one plant looks fucked up. I would try to save it but it may be too late. I would give it a good flush and see what happens. You can always make BHO and you don't need to cure it to make BHO. Just dry it out. Good Luck Dude

New grow. Need seeds.
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So its like day 30 or so for flowering.
Why are the fan leaves turning yellow? Ph is 5.7 temp in 79' f

Should I trim away the yellow leaves?
This is my first grow that has lead to flowering and I just don't know if I should have trimmed away more and not sure how long this grow should last.