Is this a form of nutrient burn?

So this spotting has just come up in the last 2 days, it's only on a small section of the plant but the spots seem to have gotten bigger.
Don't think it's nutrient burn but am still somewhat green around the ears so any input would be great
 

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Do you spraynyou plants with lights on, kinda look like nute burn or bleach spots from getting wet when lights on.
I don't spray my plants but I was thinking it might be from holding it up near my led light when in swapping to a bucket to check my pH levels ect, could that have burnt it like that ?
 
Ugh I don't know man because all your lower growth looks good maybe your light to close pull it up an inch or two.
 
I thought leaf septoria was black spots kinda like mold. Maybe different kind of leaf septoria?
I think black is just more advanced. I've only personally experienced it with tomatoes outside. Started out looking like bleach spots, then turned brown, then black specks and dead leaf. Plants still grew fine and produced plenty of tomatoes but they were a bit smaller than unaffected plants.

I could be entirely wrong hence the IMO.
 
I think black is just more advanced. I've only personally experienced it with tomatoes outside. Started out looking like bleach spots, then turned brown, then black specks and dead leaf. Plants still grew fine and produced plenty of tomatoes but they were a bit smaller than unaffected plants.

I could be entirely wrong hence the IMO.
Well i see you on alot of post, you know what your talking about. So what can he use for treatment?
 
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