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i have brown spots on my leaves im thinking the light burned the leaves or maybe root rot i dont know roots are tanish you can look at my grow for more pictures

wow thats a lil blurry but ,see how those leaves are standing straight out? thats a good sign all is ok its when they twist and drop you worry about the roots whens the last time you rinsed out your res?and how big is the res? whats the temp of the res?what are your ppm and ph readings?