Can anyone help diagnose these 3 leaves?

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applepie

applepie

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Can anyone help diagnose these 3 leaves 3
Can anyone help diagnose these 3 leaves 4
Can anyone help diagnose these 3 leaves 5
4 week veg
Grow Medium: Rockwool Hydroton in 5 gal Rdwc
Stain: 6 Ken's GDP Harborside Clones
Light: 1000w MH
Nute: AN A+B, B52, Cal-Mg, RO water

Plant growing in ph 5.5 - 5.8 solution. EC was gradually increased from 0.8-1.7 throughout 4 weeks veg with no noticeable deficiencies except that the PH runoff was usually higher than what I put in.

A few days ago my PH pen broke. Knowing the PH always steadily rises a little each day, I took a best guess and added some PH down in the reservoir daily... After buying a new ph pen and checking the runoff a few days later, My PH was at 2.9! I must have added too much ph down during that time. I did an emergency flush and ran a light H202 ph'd solution for two days.

Overall the plants still look pretty healthy, except for these 3 leaves. It's in the middle of the plant. Can someone please help me diagnose what lockout it is and if it will spread to the rest of the leaves/plants? Any help and/or suggestion is much appreciated. I've tried researching the net but unable to find any deficiencies that look so uniform.

Thanks in advance!!
 
Can anyone help diagnose these 3 leaves
frebo

frebo

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You probably found this
Image

It doesn't look serious to me, but then again, I have just used marijuana.
 
Capulator

Capulator

likes to smell trees.
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The pH caused lockout and my guess is your symptoms will progress. All you can do is let it ride. How do the roots look?
 
Papa

Papa

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. . . . and out of curiosity, what are your air temps and humidity at? and are you at 1.7 at 4th week of veg?
 
applepie

applepie

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Capulator said:
The pH caused lockout and my guess is your symptoms will progress. All you can do is let it ride. How do the roots look?
Click to expand...

Thanks Cap. The roots look normal but not as much roots as my last run. But that was a sativa so don't know if it make any difference.

Papa said:
. . . . and out of curiosity, what are your air temps and humidity at? and are you at 1.7 at 4th week of veg?
Click to expand...

Air temp daytime is between 78-83 RH 45-65% (maybe a little too low for 1500ppm c02?), night temp is 70-78 night temp, RH 50-60%. I ran 0.8 first week, 1.2 follow week, then 1.5 and 1.7
 
jaredman

jaredman

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I was gonna say it looks like a little too much food to me. If your ph was that low and ppm were that high it might have burned your plants a bit
 
D

Deez nutz

2
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jaredman said:
I was gonna say it looks like a little too much food to me. If your ph was that low and ppm were that high it might have burned your plants a bit
Click to expand...
same thing, some times people are going too crazy into the obvious.

feed less, see what happens. those things are so green they are almost blue. good indicator, along with the NUTE BURN. lol.
 
BrianDirt

BrianDirt

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Gl soil ph table

This helps too, and you can see everything locked out at 2.9 ph!
 
Papa

Papa

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yep. what they said.

a combination of pH and too hard on the nutes and it's caused a lockout. you've been following a nute schedule instead of watching your plants and giving them what they ask for. i'd drop the nutes to 1.2 right away, and then continue dropping each day while watching them until they tell you that they want more. then i'd only increase slowly.
 
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