Purple Kush Fan Leaves Dying...HELP!!!

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Purple Kush - just started 12/12 and I noticed the primary fan leaves are turning yellow/brown from the center of the leaf...PLEASE HELP


600W HPS for flower
FoxFarm Soil
Just tested PH at 7+ (I'm working on bringing it down)
Haven't seen any pests at all even under magnification
Nute Lockup?
Burn?

This is my first grow, any help is very appreciated

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Comments

M
Hey JacksonRuby. What you seem to be experiencing is either a calcium deficiency or a calcium and magnesium deficiency, or nutrient lock out of either one or the other! What are your nutrient ppm's? If you are not using any nutrients yet then forget nutrient lock out. It will certainly be a deficiency if you are only running on the nutes provided by your soil. How long have you been vegging? How big are your pots and when, if at all did you last re pot them? If you get me the answers to these questions I will help you to stop any further damage.
 
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M
Hey, I do not believe it is a nutrient burn. What kind of nutrients have you been using? It is some sort of deficiency.
 
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