please help

im not sure what it is but
its like yellow and brown and its
getting on all the back leaves
here are some pictures
its on a nice amount of leaves on the back???
maybe the light burn??
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What is your set-up? Soil and nutes?

Ive had it happen to me .. I just clipped them off .. (it was in an aerogarden) And I had no Ill affects .. It happened to my "OLDER " leaves

thank you, i will clip them soon.
do you know what caused this though??

nope its hydroponics and nutes.