Hmmmm. It's too young to say for sure.
A 3-400 ppm feed is more than enuf at this stage 3-1-2 npk or anywhere near this rato will be fine. That ppm should include your tap.
At this stage, feed every 2 days should do and as she moves on Daily feeds, with backup water feeds later on, especially if you're using synthetic nutrs.
Also, that coco packed like that. Is gonna make it hard for drainage, and your roots to catch their breath.
If I were you. Get some clay pebbles or perlite.
Good Growing