Could this be due to sulfur?

[Dreminem169]

Medium/grow method: ffof in 3gal fabric pot

Feed: and supplements used: fox farms (see below)

water source: tap 7.8

PH in the root zone: haven’t checked

Strain/age: strawberry cough ~6 flower?

light used: mars hydro tsw2000

Climate: 82F ~30-40%rH

Could this be sulfur deficiency?

 

[Couch_Lock]

I don't think its sulfur.

http://loudclouds.co/wp-content/uploads/2016/07/marijuana-deficiency-chart-jorge-cervantes.jpg

whatever it is, it doesn't look critical.

 

[namvet25]

I would flush it with ph plain water and then give a full dose of bloom nutes along with cal/mag and hope this works.

 

[Dreminem169]

@Mañ'O'Green when adding Epsom salt how much do I add to my regular fox farms nutrient regime?

 

[Mañ'O'Green]

@Mañ'O'Green when adding Epsom salt how much do I add to my regular fox farms nutrient regime?

None, I do not see a need. Your RH is too low you need to get it up to >40%<60%.