They certainly do not look deficient or over watered, thats for sure. Look pretty healthy. I woud just continue on as you are doing and monitor for a week or so. I bet its just a young plant figuring things out and will be fine.
1 tsp of Epsom salt to one gallon of water and water it . Mist it with the same solution top and bottom of all the leaves after you water it. Its a magnesium deficiency and everything else looks fine.
If you answer my questions we could figure out whats going on....so far all I know is you fed it 3 days ago...dont know soil, lights, temps, nutes all that
Nice light...shitty soil. Soil with nutes already in? I dont know many MG's that dont.. so you have over fed, I bet you seen this start 12 hrs after you fed yes?
Let's see my plants are 5 weeks old...bottom spear were dying off...everything I researched said it was time to feed...I has been feeding them compost tea since start