Auto First Grow Need Help

Hello,

Having a hard time. Plants looked good last Friday.

I fed with GH flora series on the 6th(2/.5/2 per gallon feeding to gallons per plants 5 gallon pot). Then I just watered them this Tuesday with no feed. before I left out of town for work(2 gallons per plant with probably 1 gallon runoff).

I came home to this today. Note that when I watered Tuesday the leafs were already starting to turn worse. I test my ph pen each week and water them all at 6.5 ph. I’m so confused and any help would be much appreciated. The buds are still growing fast but my leafs are dying out on me.

Medium is FFOF in 5 Gallon pots. I just started feeding 2 weeks ago when they started showing sign of potassium deficiency

They are thirsty now but I’m afraid to do anything just yet because I can’t tell if they have a deficiency or I am burning them.

I’m also adding the pics from last Friday a week ago for comparison(first 2).

Thank you for the help
 

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