Calcium deficiency?

Hi Everyone

Currently in week 6 of flower and had an outburst from the research I have gathered my guess is calcium deficiency but hoping you more experienced growers could verify! (**Only happened to the top leaves of one plant)

Also notices the past few days I’m starting to get a few of the fan leaves down the bottom of the plant drop off not sure if this is related or not?

Thanks everyone!

Looks like you mite have some mites or a pest of some sort from the looks of those leafs

A clearer picture of the full plant would help greatly.

What medium are you growing in? What nutrient? Light? Watering pH?

Details are needed to help my friend.

Calcium deficiency shows on newer growth. More likely this is a phosphorus deficiency. But as requested above more details will help get better information.