Hey Dr. Ozzy, so Ima be honest I’m not as scientific as I should be. I don’t measure ppm I’m just doing backyard grow in cali. I do measure the soil ph and on that plant it’s sitting at 7 little higher then I want. The thing I’m not sure about is what this strain eats more of. since I’ve had it it’s been slowest to bloom and with you saying it’s starving I may have been underfeeding it a little bit. I use fox farm trio and I’ve just been feeding recommended doses. sometimes I give less if I spot a change just to make sure I’m not burning it. i did realize where I went wrong this year is I skipped over couple flushes so I’m flushing all 3 this week and restarting feeding. ive had hard time identifying the issue because i Can’t find anything on brown leaf veins and my Other two plants are in very good state. So far only thing that would make sense from my research is phosph deff as the older leafs loosing nutrients and newer ones are unbothered.