So far I've only watered 3 times with no nutes yet and G.H. Roots used twice. It's is very important no to over water the plants during this period in order for them to develop a healthy root system. So fast they seem very healthy (I'm sorry that the LEDs make all of them look so purple).
One of them seems to be expressing some kind of mutation in the leaves (taken that the rest are looking very healthy I discarded the possibility of a deficiency.