wtb veteran

I'm really new. Just have a quick question and maybe someone can help me with diagnostics.

running hydro, ebb n flow.

temps are a little high, around 84.

using the full line of BC nutes.

Just wondering if this is normal die off or if this is some sort of deficiency/nute burn(see pic). Plants are about 3 1/2 weeks in.

Thanks for any info.
 

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