This week I pause for a moment for all the seeds that didn't make it in the soil.
I lost the two ne additions, after they could break the seed shell off.
Besides that I the other three seem to be doing great. I had to repot my first seedling, she's loving the new larger pot already.
The other two seedlings have had minor deficiencies over the week, all the new growth seems back to normal and healthy.
I would just flush with clean water. plant is so young i would not mess with top dressing etc right now. Ph your water to 6.00-6.5 and asses from there