So I've got these AK-48's and they've been doing rather good the entire grow. Recently one of the plants has shown some yellowing leaf tips. 1.5 Gallon pots, 20 days old from seed, just in miracle grow potting soil mix and some shultz potting soil. Transplanted twice. Hoping for a diagnosis, kind of baked... Here are the best pictures I could muster; Cheers.