It looks like theres a litle problem with the first real leaves of the seedling they are turning a litle bit yellow..
I think that i probably over feed them cuz i turns on a new soil mix..
Best of luck with our Purple Moby Dick my friend 👍
It does look like a bit of overfeeding so I would just add water for the next 5-7 day's 🤗
That should help correct this mate👌
All the best ✌️
Mark..