heh, that's what my leavs looked like when i used fox farm :) kinda kidding, since you use more than just that.
i think it's lockout or potassium deficiency? use recent behviour and knowledge of the products (labels) you ahve used... it'll be apparent if ppm of K was too low.
it can't be calcium related.. you add plenty, and when reading other labels look into if oyu are adding too much.