getting worse

[Collide88]

Fox Farm Soils. Roots organic nuts Cal-mag
water 36-48 hrs 6.3ph
Leaves started yellowing/curling like this on all plants at the beginning of last week.
I really have not idea whats wrong. Maybe light stress?

 

[Drownomatic]

Looks like cal mag deficiency, but the burnt tips and leaves clawing down suggest it could be lockout from too much nutes.

What is the EC of your nutrient mix?

 

[Smoke em if you got em]

How much cal mag are you adding to every watering? I've seen too much cal mag caused nutrient lock out on this forum recently.