Nematode's not yet epic Hydroponic thread

[Nematode]

Hydroponic tomato pics.
How they look to you guys?
They look ok but slightly off, I'm thinking its the cold nights, been in the 40's a lot at night. Seems like they took a little while to shake off the cold last year as well.
Internode spacing seems short, leaves don't seem full size, some cupping. They don't seem quite as green as they ought to be in person, the photos make them slightly greener.

What I done wrong so far:
1)started them with weak miracle grow solution instead of a complete hydroponic solution.
2) left them too long in the starter blocks(leggy)
3) didn't pre treat the rock wool to remove the lime (that almost killed them)
4) used univ of florida hydroponic recipe which was waaay too weak for cold weather.
probably some more mistakes but haven't killed them yet.

Feed is now based upon univ Arizona generic tomato pepper cucumber formula
N 189
P 39
K 341
Mg 48
Ca 170

Pics are Kellogg's Breakfast (my favorite) and Bloody Butcher (new to me this year)
For reference the Grodan delta blocks are 4" x 4".

Nematode