Might want to use some Z7 in your reservoir to clean up the roots and make sure your lights aren't scorching the plants from the top. Just my .02 cents worth.
That's a weird one. The brown serrated edges say nutrient burn. But what's with the lighter colored spots? Do the chlorotic spots affect just the lower leaves or is it everywhere? Last time I posted here your plants were so beautiful. I hope you can get it under control.
Edit: that earlier post was a case of mistaken identity. Apologies again.
I believe your right on the nutrient burn, I run CYCO nutrients which has like 8 dif bottles you use. I believe my some of my measurements were wrong... I flushed and put what I hope to be in the correct dose of all the nutrients
Ya it's pretty big I'm only growing one mostly because this is my first DWC system so I figured one would be easy enough to fine tune my skills lol
She is 4weeks into flowering