MID-FLOWER DEFICIENCY : HELP NEEDED

Hey folks a lil help is needed here, I have a GMO under led and cmh lights, in a 3gal fabric pot, with coco(not charged) and perilite. In week 5 and I recently flushed her with amazing results the next couple days. She just recently started shoring sings of a cal or mag def, but I really can’t tell. For the last week I’ve been giving her sfl1000, cal-mag and a guano tea.
Any help is appreciated.