stunted stringy growth

What is wrong with these ladies? I've attempted to try and diagnose them but I would like some second opinions from the experts please kiss-ass

give them time mate they will fill out. good luck

Yo don't look too bad but they are a little flat~
What yo ppms and size of the pot?
Possible under feeding nutrients or
root issues cause of over watering?
It's drooping from something~

When i had this happen to me it turnt out that the pots were too small an the plants were getting rootbound, wat size pots u using?

i am worried about my bubblegum plant. i have attached those pics to increase the odds of possibly identifying what the problem may be..... i might be a sulfur deficiency!?
water every other day with RO water
they are growing in coco and are receiving a aact once a week, nutes between along with plain filtered water.
they are in the 2 gallon perfect pots
just tested the ph runoff of a fresh water rinse: 7.06
and ppm was: 648
i feed heavy 16 bloom a and b and prime, humbolt's deuce deuce, ginormous, and honey.
the tea feed gets brewed with ancient earth by GH, molasses and sea kelp

I have same problem with my plants so ....But I heard that kind of nut problem ....

HELP! more pics of plant with lights out so the hps wont effect the color

any ideas anybody? past experiences?