45F bucket Sativa in some serious trouble

This has been developing for about two weeks now.

Stats:

- Medium: coco
- Strain: Northern Lights x White Widow
- Nutes: Canna Coco A+B, Cannazym, PK13/14 + recently added cal mag
- pH in WAS 6.2 (too high?)
- EC in WAS ~2 (too high?)

I've since flushed her down to EC 0.2 and have gradually reintroduced nutes back up to 700ppm, whilst lowering pH to 5.9. I've also added in half strength cal mag because I suspect cal mag issues may at least be part of this.

No improvement yet... Am I on the right track though? What kind of deficiency is this? Or is it an all out lockout caused by too high pH + overfeeding?

Please go easy on me, this is only my first grow...

Way too much nutes

Trying to flower in this junked up stage.... Have no idea what you did to it but plants don't respond well to "corrections" at this stage.

Just keep it watered and hope for what what you can get.

This didn't start until a week ago. It was perfectly fine in veg.