I’m attaching photos
I believe the problem can be solved with Advance Nutrients’ CalMagExtra; I think it’s just a magnesium and potassium deficiency, but I’d like your opinion.
If you don’t have a Growlog please answer these questions.
What strain are you growing? Is it Auto, Fem or Reg?
Are you growing Indoor or outdoor?
Are you using nutrients? Which ones? How much?
Welcome to the community! That’s what it looks like to me too, but I’ll wait for some more seasoned vets to chime in. I’m assuming you’ll see quick improvement if you weren’t giving calmag before this
That’s what it looks like to me as well. If you haven’t been using a calmag it would probably help quickly, if you have been using one already though raising the dose usually won’t help much. Sometimes the reason you are getting those two deficiencies together is actually because of the calcium levels. In that case a stand alone mag supplement like epsom salts would help a lot more.
welcome to the community @ZioCanna64 and I hope you enjoy your time here. As for your question I agree with previous posts and run into that issue myself but like previous posts your correct about your issue and as crackadoo suggested if ya already been feeding calmag you may need stand alone magnesium. but feel free to ask any questions or concerns ya have as this community is very chill and wicked helpful and happy growing
I believe it’s lacking some nitrogen on top of the
Cal/mag. So adding Cal/mag would help bc most Cal/mag carries some nitrogen with it.
CalMag, right away first thing is calmag, more specifically the Calcium, make sure pH is right and if u haven’t fed her calmag yet I’d do 50% per gal and I’d give her that next watering.
To be absolutely sure, check the underside of the leaves. I just had spider mites, and at the very beginning, the leaves also looked like that before the disaster began.
If you find tiny critters or eggs there, put 2 drops of soap in water in a spray bottle, spray thoroughly from above and below. 2 days and they’re gone.
Afterwards, I sprayed my ladies with a mist in the shower so that no soap taste remains. Mine were in flowering week 4 
