Is this fixable?

[Darwin]

This is a Blue Mammoth about 3 to 4 weeks from being finished. Shes in a 3 gal pot, in soil/coco mix. shes being fed with some "franken nutes". I have Botanicare pure blend pro grow and liquid karma, Advanced nutes big bud powder and cal mag+. Im using tap water (starting pH of 8.5, buffered to 6.5 w/ pH down.)
I just recieved General organics GO Box, which i will start in a few days, but the last 3 days, this has happened.
Its mostly the newer leaves but not bud leavesIt looks like a combo of potassium and calcium deficiencies? nute burn? Im changing to the organics because I feel like this happened as soon as the advanced nutes was added in.
Really, I would just love to know if and how I can fix this or stop it. I dont want to lose this baby!! shes so close!
HELP!View attachment 154813

 

[Duck Commander]

In my oppinion if your chopping her in 2-3 weeks then dont swet it its just cosmetic and shouldnt affect your bud at all.. Plants let you know what they need by showing signs in there leaves but as your near the end i wouldnt personaly bother trying to correct it but thats my

 

[GoAuto6]

I have aquestion for you you said" (starting pH of 8.5, buffered to 6.5 w/ pH down.)" now my question is, do you add you'r nutes first, then check ph... the reason I ask is nutriants will lower ph, if you ph first then add nutes, your ph is gonna be low creating a lock out.

 

[namvet25]

http://www.growweedeasy.com/marijuana-symptoms
HaHa ,I did it .check this out,scroll down to the picture that looks like yours.