Seedling leaf curling

[dippypee]

I have 2 seedlings going right now. One seems to be going fine the other has alot of leaf curl. So far I've only been watering them 6.1 ph water with 55% humidity. I was waiting until day 10 to introduce nutes but im not sure what i can do to help. Growing in coco perlite. Anything would be appreciated, cheers.



Pic of them. A week since germination

 

[Arthur]

Coco you feed every time, from the start. It is not soil, and shouldn't be treated as such. It is a hydroponic medium.

Never plain water in a coco run, never let coco dry like soil as well, it needs to be kept moist. In coco, I'm feeding every 24 hrs. At this stage it isn't much, maybe a couple cups of fluid, but by the end of flower, I'll use almost a gallon of feed per 3 gallon bag, every day. Many feed several times a day in coco.