Cotyledon Curing Under, Should I worry?

Hi guys,

This is my first grow and am just wondering if the first leaves should be curling under like this or is it indicating lack of humidity or some thing else? They are only a couple of days old and look really healthy otherwise. This will be a hydroponic grow using an 8 pot wilma and I was also wondering when I should plant them in the clay pebbles?

Thanks for looking and I am sorry if I have put this in the wrong place.

yeh there fine m8 repot wen they have a decent ammount of roots comeing from cube. gd luck buddy

look fine to me, man.

The light may be a little close? But "meh" looking great to me

Thanks guys, think I'll start a grow journal