Diagnose this leaf.

[divestoned]

can anyone positively identify this issue?

[MisterE]

Invisibility ;)

[Weedhound]

Lol. Yep, lack of substance for sure.

[divestoned]

apparently the good pic was too big.....so here is a less good pic. Name this deficiency.

(if you guessed nitrogen you were correct)

c99 is a nitrogen HOG!

[latewood]

roflmao

[latewood]

I hate to tell ya cuz...but you can probably add potassium to that list...a nitrogen deficency itself would create a more evenly yellow leaf before it got to that point. PLus...I swear I see a ??? Wait! Well...Let me ask you this...just for fun. OK? Do you use epsom salts? check ya later

[divestoned]

no no epsom salt but i hear it works good as a ph up......

[bud luv]

yeah that's not just an N def

[stinkyattic]

you have FAR bigger problems than N def... in fact judging by that nasty BURN it's not a def at all but a lcokout situation

[latewood]

It looks like a possible N with a Magnesium overdose...but actually I think the inner part of the leave is too green for Nitrogen def...Read up on Mag and Zinc toxidity, because when one element% is too high; Another is being locked out...Magnesium oftens conflicts with calcium...(good reason to use calmag+...perfect blend) goodluck...

I woulld lower my EC and by adding a fresh batch of light nutes...dilute your recipe by 25-50%

[Blayzd]

hi, new to growing and am currently in the procees of growing.
I have 2 plants, 1 which looks nice and healthy n coming along just fine, 2nd plant, well its looking a bit sick, sounding like we have the same problem maybe, anyway heres the pic