Hi need help is this calcium def? Chocolop autos from here 
5lb cloth pot indoors, organic soil, flora nutrients, water PH 6.2-6.8. Week 7 of flowering. Spots appeared on top branches not on entire plant just one large branch of plant. How do I treat? Flush and calmag? Or calmag and nutrients?
Looks like calcium.
Thank you.
calmag her quick smart ! 
Thank you, how often do you suggest?
It’s best to follow the package directions. You also are showing a bit of N excess which can cause lockouts of other nutrients.
As @Myfriendis410 said, you’ve got a bit too much N going in. Discontinue whatever N heavy nute you’re using, add some calcium supplement (cal mag will work), and then re assess the situation. There is usually N in cal mag, so don’t got crazy with it.
Thank you had a family emergency so I haven’t been on the site but I appreciate you guys hope all is well with everyone stay safe🙂