Cal/mag defeciency or too much wind?

Doesn't look like a magnesium-related symptom. Does not look like calcium related, either... remember these are 2 unique elemnts. there's no such thing as a calmag deficiency... that would be 2 unique deficiencies of both ca and mg coincidentally occuring at the same time. Does look like most the damage is mostly in one area... could be something like a fan Did you change the fertilziation in th elast few weeks? Maybe amped up P or K? Well if you move the fan, and it stops progressing, that makes it easy to diagnose. Unless it's deteriorating extremely fast, i'd be patient and see what happens before overreacting. The paling isn't caused by the fan, though... that's something else. You got more than one thing going on. better formulas work with a wider range of strains. Time will tell how well this formula works across numerous strains. if it's rare, no biggie you deal with it. if you regularly get 1 of 4 plants showing issues, then it's probably the formula.

Looks more like wind burn than a Cal-Mag deficiency, especially since it’s only happening to the plant right in front of the fan. Try redirecting or lowering the airflow a bit. Cal-Mag deficiency usually starts with rust spots and spreads to other leaves, but this looks more like leaf edge damage from too much direct wind. She’ll recover fine once you adjust it

Not wind related. Possible pH issue OR she's hungry!

same q, same a