Chemo,
Note the striped pattern on your leaves? Thats called interveinal chlorosis..which is just a fancy way of saying the color between leaf veins is fading. This is symptomatic of several deficiencies. The guys feel it's your soil ph...which certainly could be true. Cannabis is an acid loving plant.
It would be risky to add more nutrients since they are not being absorbed properly. Keep working on lowering that soil ph and maybe...a little Epsom salts...but only of you reduce nutes a bit. That's how I would approach it.
JD