to the folks who have been at this a while.

Always Ph your water,whether it has nuits or not.
Two weeks plain water is hurting your yield and quality.

rotten roots will give your chit a foul taste, and from the pics your burning them up. back off on your total PPM by 50%
curled under leaf edges and burned edges/tips is a clue, they also look as thow they need more air movement/fresh air

hope this helps, NOBODY knows everything, we have all figured out things others haven't yet, thats what this forum is all about. helping each other figure out its an elephant

Daddy