Late flower leaf issues please help!

[Stimn11]

Problem: leaf edges turning brown with spots between the veins. Yellowing veins. Leaves clawing downward. Brittle leaves that snap when bent.

Medium/grow method: fox farm ocean forest

Feed and supplements used: Blue Planet nutrients organic every other watering usually water every other day. I used mammoth p 2 times during flowering and gave 1 scoop of pk booster after flush thinking it was a k deficiency
Week 7 feeding schedule
7ml grow 4-0-1
7ml micro
10ml bloom 0-4-4
3ml vitablue 2-1-4
4ml liquid blue 2-4-10
1/4tsp easyweed 1-2-18

water source: Tap water ph 6.5

Strain/age: Gorilla Cookies around week 7 or 8

light used: Spider Farmer SF-2000 200W dimmed to 80% around 14" above canopy

Climate: 77F Humidity 55-70%

Plant started with browned edges of the leaves and spots between the veins, I did a flush and after a couple days started with the nutrients again but the problem started to get worse

 

[namvet25]

Seems to me you are over feeding,Leaves will srart turning yellow and dying off and this is normal towards the end of there life cycle.I would raise the light up to 18 inches and go full power for flowering.Harvest when pistols are mostly brown and trychomes are mostly milky.

 

[Drownomatic]

Initially the brown spots and inter yellowing looks like magnesium deficiency, but Mg lockout can be caused by too much fertilizer, and the burnt tips suggest that.

 

[BigB6]

To much fertilizer. They're nearly finished so just feed them water. They will be fine, dry and cure well and you'll be smoking top shelf shit