Indoor Brown spots between leaf veins, only top pair

[Animatey]

Not sure if this is mag def, it's weird because it is only on the top 4 small leaves.

Plant is 30 some days into 12/12, only plant in the tent with the issue.

Any ideas what it could be?

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[namvet25]

What nutes are you using and are you using cal/mag?

 

[Animatey]

What nutes are you using and are you using cal/mag?

Hey man, I'm using GH trio but I think my EC was too low. I talked to a couple experienced rockwool ppl about what I was feeding and they said it was way too low.

I was at .9 EC and I'm up to 1.7 now after slowly upping it over the last few days.

Haven't seen it get worse so it seems OK for now...

Thanks for checking in on this!

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[dickfitzwell]

ya but it should start getting better not stay where its at, you gotta ad cal mag like @namvet25 said