okay, so, yellowing leaves? and drooping leaves on a different strain

[toughwork]

so i am currently growing 2 separate strains in my 6*7 room with 1800w hps 1=1000 & 2=400

in soil using advanced nutrients 3 part (micro,grow,bloom) + PK 4/8. im in the middle of week 4 (flowering). and last week my plants started yellowing (both strains). and since i started flowering, 1 strain has had droopy leaves, but it seemed to growing fine. now the yellowing.
my nute solution is at about 6.5. room temp days is about 85 and about 65 at nights. humidity is 45% day and night. This is my first grow.

 

[toughwork]

here is my room

 

[toughwork]

here is the sweet tooth... 3 days ago and then yesterday (comparison for yellowing leaves

 

[toughwork]

and here is the white widow? from 3 days ago and then yesterday.. drooping and now yellowing too. also a couple of beauty shots this one is 3 days ago. and the ones below were taken last night.

 

[Maximus cannabis]

Are you using RO water? That looks a little like a magnesium issue.

 

[kuyun]

here is the sweet tooth...

 

[Maximus cannabis]

Also what concentration are you using for your food?

 

[toughwork]

Also what concentration are you using for your food?

no on the RO water... its tap.. but im in WA and its pretty good water. and for the nutes.. 4gal water 40ml micro 40ml grow 40ml bloom and 32ml PK 4/8

 

[Maximus cannabis]

Well, so this is just my opinion, but you're going to get some yellowing in bloom. The plant is losing nitrogen. If you were in veg I would be more concerned, but you're almost done, the plant will start to fade from this point out. Maybe it's normal? Are there any other signs of stress, or weirdness in upper leaves?

 

[Maximus cannabis]

Did you ever do a flush? Maybe the soil PH is off? What are you growing in?

 

[Maximus cannabis]

How often are you watering?

 

[toughwork]

How often are you watering?

okay bud, ummm, yeah i did flush them all after week 1 thinking i had a possible lockout/PH issue... no difference ... soil runoff PH is at a 6.5.. and for the sweet tooth im trying to go 10 weeks... my buddy gave me these starts from his and thats how long his took to fully mature... VERY nice strain BTW. but the WW is halfway. Is it a possible nute deficiency? like maybe im not giving them enough... the bottles say 15mls /gal im only doing 10mls/gal and im only watering when they FEEL light, like they need it

 

[toughwork]

i also check like the top 3 inches of soil to make sure its dry

 

[toughwork]

any other ideas guys?

 

[toughwork]

Still in need of some help if anyone else has any ideas