Let me present to you two seedlings started at the same time and grown under the same conditions. They are two weeks old and both growing in 5gal buckets with rockwool using DWC.
Seedling A (Wedding Gelato)
pH 5.7, ~400ppm, ~85f, no visible roots below rockwool
Seedling B (G13 Haze)
pH 5.7, ~400ppm, ~85f, roots hanging below rockwool
My assumption was that Seedling B was getting too many nutrients, yet Seedling A is doing great with the same levels. I have since flushed and gone back to plain pH 5.7 water with no nutrients for Seedling B. I’m somewhat skeptical since what I read about G13 says that it soaks up nutrients like nobody’s business (and because the other is doing well), and yet…
Any advice other than try to let it grow without nutrients for a while?