Hi
@Nimas! From what I see on your latest pictures, your plants look healthy, despite the slight yellowing on the lower fan leaves. I think they might need some more Nitrogen, this looks like the first signs of a Nitrogen deficiency. Also be careful, your medium looks really wet, you don't want to overwater your babies, this will result in slow growth and can lead to nutrients lockout. Let the medium dry before doing anything, try to follow a wet/dry cycle, roots need to search water in order to spread, so you probably should water more often with less water. Now regarding the smell, I've experienced this with organic nutrients when the medium was overwatered , since you added manure and a lot of water this is not surprising. Once again let it dry, the smell should slowly go away. Hope this will help, keep us up-to-date and happy growing 👊