Deficiency in flower week 4

To me it looks more like being burnt by too much nutrients, or damage from the leaves hitting the net when your fan is switched on. The very small brown spots are really of no concern. You will never have 100% perfect leaves, 100% of the time. A good source of organic, slow release calcium include bone meal and oyster shell flour. A good source of organic, slow release magnesium is volcanic rock dust. In fact, volcanic rock dust is a excellent source of every minor mineral your plant requires. Also, as it is such a natural product, it is impossible to do any harm to your plants when using it. Hope this helps..... Organoman.

dolomite lime n epsom salt... 🤘😤