The plant has a severe Cal mag def, week 4 of veg ...

Def can be saved. just run plain water with cal mag in it for the next week to 10 days and watch her recover just fine.

I can't find where this grow is, but that's N tox for sure and the Defs are just an after affect of nute lock. Good luck.

You have a couple probs pal. Yeah a cal def but it's not from the lack of what you are giv8ng. You are experiencing nute lock. Sometimes in nute lock things like N gets taken uup too much and stuff like cal and P are left behind and N tox dominates. She is still savable. Flush her and just water wit some cal and micro if you have and then build back up NPK slowly begin with 1/3 of what you were giving her and watch the new growth as you'll only be able to tell on new growth are you coming out of it them leafs will stsy that green, so look to new growth for signs of coming out of it. I'll look through your diary. But your leafs are way to green so it started out as N tox and now you are getting Defs cause Nitogen has taken over.