It looks to me like you have pH problems.
Flush your soil with tap water with a pH of about 6.3. Do not feed nutrients. Collect some runoff and test it's pH just as a reference. Let the soil dry out so the pot feels light but not dried out so that the plant wilts. Just lift the pot everyday and when it feels light, then water with a dose your feed chart recommends based on what week you are at.
I grow in Coco and i water 2x a week. 1st watering with nutrients, 2nd watering with cal-mag. I usually pH between 5.8 and 6.4 Always pH your water no matter if it's plain tap water or a nutrient mix.