1st Timer, Please Help me, Whats Wrong

Greetings,
I need some serious help. I am at a wall and cannot figure out what I have been doing wrong? My setup seems flawless but my plants are not doing well. My and another friend are growing together, ( same strains, Blueberry & masterkush, Dutch passions). Both of use using DNF grow a & b Ferts.I have a 5X5 tent with a 1000watt HPS ballast currently veg, in week 7 under a sunmaster conversion Mh. Humidifier with 200cfm carbon filter with a 4inch vortex 200cfm fan. Also a cool air hood. We a both on 24 hours light. my temps are 74-78 with rh at 55%. Seems perfect to me.
Please help my come to a conclusion as to what i am doing wrong so I can perfect this art. This is my first grow so I am eager to learn.
My friends look magnificent! really perfect, three times as tall, lush green, all leaves point 45 degrees & at 5nodes mostly. I killed my first set of plants at 4 weeks with too much neem oil so he brought me these 3 in photos to help me. Since i have had them they have gone steeply down hill, yellowing & wilting. I believe it could be under watering at first because i was not watering until runoff. Also could air pressure be a problem. As my tent as a a broken zipper and the velcro is allowing air to enter. Nutes may be a problem too. What am i doing wrong? Any suggestions please.

tell me exactly what the differences are between your setup and his

plant pics would help, could be nutes or watering prob, could b many other things, hard to tell without pics

to me yellowing means to much water. they are drowning.

soil type(ie: how many nutes soil already contains),composition of siol( ie: how much air it can hold) and pot size all play an important part in plant growth.
Plants don't require alot of nutes during the first 6 weeks of life, espesially if they are in soil, as soil contains elements for the plants to feed on. When watering, water till the water runs out the bottom(ie: mini flush) and then allow to stand.If your soil is well airated it should dry out within 4 -5 days.allow the soil to dry out completely before your next water.
hope u get sorted man!
post pics for better help...

pics are at
https://www.rollitup.org/indoor-growing/140656-1st-timer-please-help-me.html

Is that possible from under watering and over nutes? Also i have not been able to keep the leaves up, always droopy.

I am using promix HP. The difference is his are two 400w in a furnace room. Nothing Else! ( no filters, no are in/out, parabolic reflector, and he is not even monitoring temps and rh.