You do not have to fertilize your seedlings till at least their third week of life. Your plants look healthy. To me it looks like you have a tight internode length, which is good. Keep doing what you are doing. It is normal for lower leaves to yellow and die when there is hardly any light reaching them.

Do not add moisture to your grow room. 40% RH is good for veg and will only rise when they are in full bloom. Then you will be trying to lower humidity. Whatever you do don't buy a humidifier, get a dehumidifier if anything.
Perp Reviewed by Perp on . SHOULD I GIVE MORE NUTES? Hello All... I have less than ideal conditions. I constantly think im overwatering but now maybe I think I might be underwatering. I started to give a small bit of nutes 4 days ago. 1.5 ml Per gallon of BOtanicare Pure Grow Pro. the recomended is 7ml in seedling stage. BUt they were only 2 weeks old from spruout. So I was a little worried. I think they need some more what do you think? Also there are 2 strains ones a mainly Sativa and the other Indica. I only have one Indica and it Rating: 5