whats wrong with this lady

What can be wrong with the lady
Trying to figure out what is wrong with this lady
Vegging stage
ph run off is 6.5
ppm run off is 450 at 700ec scale
Using maxigrow
1000 hps bulb
temp when lights on is 25C
temp when lights off is 20C
CO2 burner
medium is promix
3 gal pot

sorry couldnt get the pictures the right orientation -_-"

Hibok,
On that 450ppm runoff...what was the ppm of the feeding? And how frequently are you feeding? I see at least one crispy brown leaf tip meaning nutrient burn. The accumulation of nutrient salts in the soil can block absorption...hence the yellow leaves. Awaiting a response to my questions.
JD

Brother, maybe you should consider flushing and transplant. JMHO
Good Luck

Johndee,
Ppm is at 980 @700ec
Feeding schedule was all food every time .
I see now what u explained I am going back to nute , nutes, and water.
I will give an update in a week, I am 100% certain you JD and ring sixty are right.
I am going to know out in a ph water with no nutes in the water schedule.

Thanks for the input .

hibock,
Ya, a flush is def indicated. Then just water, and some people suggest lowering light intensity. Let the plant recover for a few weeks and then slowly re-introduce nutrients at a lower level. And only every other watering. Good luck...
JD