'm growing in an aerogarden farm and I had similar issues around weeks 1-3, check to see if your roots look slimy. I had high res temps so I used frozen water bottles to keep that in check and started using a compost tea I brewed for 48 hours (Google Heisenberg tea). I also live in a really dry environment, I noticed your humidity is low, my planted perked up w lot when I invested in a nice humidifier. I hope this helps you.