After looking at your diary, there is nothing really going on to cause any problems, so would say it is just a "funny leaf" for whatever reason.
I assume you have good air circulation, otherwise the only other thing I would try and blame is excess heat, but highly unlikely with only a 100 watt LED.
After further thought, perhaps ease up on the root formula, giving any nutrients too often can lead to a build up in the soil, so when growing in pure soil, I would recommend 2-3 waterings with plain water and one watering with nutrients. This will provide adequate nutrition and prevent anything from building up in the soil to toxic levels, which may occur if you were giving the "root up ecolizer" each and every watering, and this may be a reason for the "funny" leaf.
Hope this helps,..... Organoman.