New growth is yellow...

I got 2 weeks old NL seedlings in a bubbler that i just built recently and so far so good they are still growing fast every day but now it seems like all the new growth on them is turning yellow almost fade to white! I check my water every day my ph is 6.0 and i started out with a EC at 0.6 im now at EC 0.8 and slowly building it up... I was using GHE flora series nutriants until today and i just changed to Atami hydro nutriants in hope for better success. My root system looks good all rooted well and white no sign of root rot or anything maybe its a nutriant burn or nutriant deficiency? i just can´t figure out what´s happening my temp is at 24-celsius during lights on and 40-moisture.
Please if someone out there has had the same problem and found a cure for it please let me know or if someone with a good experience.


Here are some pic´s...

check ph and stuff nitrogen diffenency mabey

burn maybe they're still young

I just did that and there is nothing wrong with my ph its at 6.0 well im not sure if its an nitrogen diffenency dosent look like it but it maybe...
Anyone out there who knows what the hell is happening to plants ??? im scared that i might loose this set of seedlings

it dosen´t look like a burn either the leafs are not dry or anything like that, just turning up yellow i also noticed that if i take a very good look at the leafs i can se that on the bigger leafs that are green i can see a few yellow spots almost white its so yellow... but im running them on a very mild nutrient mix jut like my application chart tells me and my EC is at 0.8 maybe its to much for two weeks old seedlings? But still they keep growing very fast.
Any ideas what i could possible do to prevent this yellowing or anybody had the same stuff happen to them?