6 weeks into flower plants not too happy help please

[Fortygrit]

I’m 6 weeks into flower and this past week and a half my girls are looking a little pale and sickly. I have approx 3-4 weeks to harvest. Help diagnosing potential problem(s)...Deficiency? Excess? Light stress?. Growing in promix HP. PH of feed/water 6.2-6.5 in with runoff the same. Good uptake of nutrients between feedings according to my ppms. Tent temp 65 deg min (lights off) 76 deg max (lights on). Plants under HLG 320w 3qb LED light.

I expect some leaf yellowing etc as flowering progresses but this seems excessive. First 2 photos White Widow. Last 2 photos Hulkberry

 

[OrganicBudz]

Looks like overwatered

 

[kmog33]

Underfed/lockout.

 

[PadawanWarrior]

Check your ph too.

 

[Fortygrit]

Thanks for the input everyone!
I think I learned my lesson on last (first grow) about over watering and these gals get water until a small amount 5-10% of runoff then left to dry out until the pots are very lite. 3-4days. Has not been a problem throughout this grow so far. As I mentioned initially I doubt the plants are locked out there is excellent uptake of the nutrients between feedings according to ppm in the runoff (drops about 500-600 ppm each time). Feeding with green planet Medi-One Nutes following their feeding recomendations to tune of 75-80%. Also adding Cal mag 1ml/l with both feedings and watering. Perhaps certain nutrients are being locked out and others not? PH is consistent around 6.3-6.5 going in and in the runoff. Using a good calibrated blu lab ph meter but perhaps should double check with an in soil tester. All of this is what made me think that the LED’s might be the problem

 

[PadawanWarrior]

Thanks for the input everyone!
I think I learned my lesson on last (first grow) about over watering and these gals get water until a small amount 5-10% of runoff then left to dry out until the pots are very lite. 3-4days. Has not been a problem throughout this grow so far. As I mentioned initially I doubt the plants are locked out there is excellent uptake of the nutrients between feedings according to ppm in the runoff (drops about 500-600 ppm each time). Feeding with green planet Medi-One Nutes following their feeding recomendations to tune of 75-80%. Also adding Cal mag 1ml/l with both feedings and watering. Perhaps certain nutrients are being locked out and others not? PH is consistent around 6.3-6.5 going in and in the runoff. Using a good calibrated blu lab ph meter but perhaps should double check with an in soil tester. All of this is what made me think that the LED’s might be the problem

An excess of some nutrients will lockout others. If it was me I would give them plain water and see how they respond. I also plan to buy the Blue Lab soil pen soon, just so I really know what's going on in my pots.