Experienced grower needs some help.

Dudes, I have grown 1 successful grow u all know about. but this time I am experiencing yellow leaves on my young plants (hydro). Am I getting too relaxed?? over feeding is what I guess. You guys who do hydro, give me some pointers man!!! I take that back... Yellow TIPS...

Thanks

I am sure it's the nutes but I wouldn't worry too much. They will be fine I am sure.

They r doing fine now, I guess I just socket it to 'em a little early. :)

lack of pottasium or magnesium