please help

hi all, im having a problem with my babies.
they are 2 weeks into veg and i dont know whats happenning to them.yellowing leaves but some have green veins still and they are curling here and there.i will post some pics shortly just waiting for light to come on.

what kind of lights are u using is it indoor or outdoor what kinda soil. how much r u watering it? its prob overwatering if ur new thats usually the problem took me a couple weeks to figure out how to water them right

using 600 watt indoor.clones were in rockwool cube and i put them straight into hydroton balls.watering 15min every 2 hours with canna veg

have they already sprouted roots? cus if so u might be overwatering them even with the hydroton. and is it auto watering? u got some kinda hydro system?

its a recerculating system with free flow drippers 15 mins every 2 hours but i just cut it back to 4 hours do you think it will help

yeah they had roots just comming through rockwool 2 weeks ago when i put them in hydroton.
will put some pics up soon but i cant find my cam....damit