I’m assuming this is a magnesium deficiency but I’m second guess myself and I‘m hesitating on doing anything until I can get confirmation. It started with the leaf in the top right of the pic, which is the bottom of the plant, so I know it’s mobile. The leaf on the bottom of the pic (top of plant) started to exhibit symptoms today. It’s a Northern Lights Auto in a 2/3 Fox Farms Ocean Forest, 1/3 Royal Gold Tupur mix, on Day 19. I started LST on Day 17, and on day 18 I noticed the leaf in the top right of the pic exhibiting symptoms and today noticed the same symptoms on the leaf in the bottom of the pic. The last watering was on Day 16 and included per Gallon - 1/2ml House & Garden Amino Treatment, 2ml Cal-Mag, & 1 Heaping Tablespoon Organic Unsulphured Molasses with a PPM of 376 and PH of 6.3 Any and all help is greatly appreciated.