Hungry seedlings?

[OgGrowingDro]

Hey guys I am still fairly new to growing and am wondering if these seedlings look okay. I'm thinking they might be a little hungry? Ive got 4 northernlights autos I will be growing in a rdwc setup I started them under a T5 and now have them 30" under a bestva 2000w (400 actual) on grow switch. I am using RO water at less than 30 ppms and just started to water with about 150 ppms of nutes(ph'd) (GH trio plus calimagic and dg protekt). Temps have been 68-79 and been trying to keep RH above 60. Thanks

 

[Nugg]

Sounds about right to me.. could even go up to 200-250. Ppm. pH 6.0-6.2