Looks like a lack of nutrients to me, if I were you I would set up an automatic watering system with a timer. That way you can leave it and not have to worry about it.
It's definitely stressing, what is the PH around?
I actually just finished my first harvest, I just did a ton of research before starting anything. Put in the work because it will be worth it in the end.
ill try that for a weekHey don't panic. Give 'em fresh clean water for a week. No nutrients no nothing. Then give them fresh water with a nice rounded nutrient. It looks like a nitro def. to me, but it sounds like you panicked to save them and may have done more damage. Trust me, flush water only, then get them right nutes. Things will be fine. Hurry too. Make sure your pH is between 5.8-6.8 for hydro too.