Is this plant sick?

[Drogon]

So I just transplanted them from solo cups to their new home about 2 days ago. They went through "transplant shock" (whatever that is) and were droopy all day yesterday. I decided to water them (with nutrients) while they were droopy because the soil looked dry and I was scared they might be thirsty.

Anyways here they all are today, looking somewhat normal. However, I am having issues with one plant. This one plant has seem to be problematic from the beginning. From seed this plant was about 3-4 days late to germinate while the other 4 all popped within 24 hours of each other. If you look at the first set of leaves on the bottom right you can see 2 brown spots that have been present since that leaf formed. Also, I tried to make it obvious in the photos, the top leaf that's curling. Does anyone know whats going on here?

 

[The Germinator]

They look fine to me.

 

[ChronicAffair]

I see some light bleaching. Back your light up.
See how the leaf inner veins look like speed bumps? That's from overwatering.

 

[Drogon]

Thanks! I thought I was going to avoid over watering issues by planting in coco but I guess not
I have a 600w HID about 15 in. away from the top. You think 20 inches is enough?

 

[ChronicAffair]

Can you do 24"

 

[NuttyProfessor]

i wouldnt think over watering , they look fine , just let them settle in to their new home , i water ever day in coco , its pretty hard to over water and i dont use perlite like you .... how is the humidity ?

 

[Drogon]

i wouldnt think over watering , they look fine , just let them settle in to their new home , i water ever day in coco , its pretty hard to over water and i dont use perlite like you .... how is the humidity ?

Yeah, I planned on watering everyday as well.
Humidity fluctuates a lot however, it never goes lower than 35 or higher than 60. Its usually in the 40ish range. Temps are about 68-80 Fahrenheit depending on whether or not the light is on.

 

[NuttyProfessor]

spot on . they will be fine