Some pic updates, day 7.

The first 2 are just good and happy, the third is the pic of the runt (which is actually one of the nicest looking right now) and the fourth is one that has some little browning on the tips of the 2 big pointy leaves (actual scientific terminology used there) :/

Any thoughts on the browning? I'm using this soil called Supersoil from Home Depot that has a ph reportedly in the 5.5-6.5 range and pretty minimal nutes (i think).

0.14% N
0.09% Phos
0.02% Potash
0.25% Fe

Any thoughts would be appreciated on the yellowing, or the growing...