Midleaf turning dark/brown

[Dirrtybirdy]

Hey everyone,

I'm having a little trouble it's a few plants. The middle of the leaf is turning a dark color. I noticed this yesterday and today it's turning light brown. Stats listed here

Mega crop @1.5ec
Sweet candy @.1ec
Bud explosion @.1ec
Temp 75 degrees
RH 55%
Grown in rockwool
PH @6.0

Thanks for your help!

 

[Kevinkellog]

Looks like we have some nute locks. Deficient in some and others no. Ph is a big one for this guy. Light nutes after you flush

 

[Dirrtybirdy]

Looks like we have some nute locks. Deficient in some and others no. Ph is a big one for this guy. Light nutes after you flush

I'll give it a flush in a couple days after I raise the ph.

Depending on the strain the PH can be 5.5 to 6.5. I would adjust your PH higher to 6.3 to 6.5 then go down from that. You know 6.0 isn't working but I can't say to drop it lower say to 5.8 , I always start low and raise.. wait for other replies........

it's blue dream. I've been in the range of 5.8 and 6.2. Never had a problem until I flipped to flower. But since flower I've been at 6.0. Next feeding I'll try 6.2-6.3 and see where it goes.

 

[Dirrtybirdy]

I did a flush play night, but a day after the first pictures were taken the dark brown leaves turned to this. Hopefully the flush stopped the progress of this problem.

Anyone know what this could be?