Plant ER! Nutrient lockout, Root Rot, deficiencies or toxicity!

I've been having constant issues with my two plants ever since I started. I had them in a dwc with no problems the first week and now constant deficiencies that I can't fix. I'm completely new to growing but I have a lot of knowledge on the subject. I will post everything with pictures, please help me get my girls growing!

I have tried everything at this point tho. When I started to notice the issues, I restarted with distilled water and half the amount of nutrients recommended. I then would add small doses of cal mag or nitrogen or calcium or whatever I could until a change, but nothing. Both of my plants suffered a nutrient lockout when my dumbass started with max nutes and fresh out the tap water. When I finally got my pH and TDS meter in the ppm's/EC were at 1800/3.6!! On top of that was root rot from some fungal infection from pests and I ended up have to cut it entirely from its roots and treat as a new clone now. The one pictured is recovering from root rot and just moved from a DWC to an aeroponics setup. Currently it's just in spring water with 110 ppm and 6.1 pH at 69 degrees. What are some recommendations for my feed amounts and what can I do to fix these damn leaves? Sorry I forgot to put this in the original post.

Here’s a start.

Yeah I have tried everything at this point tho. When I started to notice the issues, I restarted with distilled water and half the amount of nutrients recommended. I then would add small doses of cal mag or nitrogen or calcium or whatever I could until a change, but nothing. Both of my plants suffered a nutrient lockout when my dumbass started with max nutes and fresh out the tap water. When I finally got my pH and TDS meter in the ppm's/EC were at 1800/3.6!! On top of that was root rot from some fungal infection from pests and I ended up have to cut it entirely from its roots and treat as a new clone now. The one pictured is recovering from root rot and just moved from a DWC to an aeroponics setup. Currently it's just in spring water with 110 ppm and 6.1 pH at 69 degrees. What are some recommendations for my feed amounts and what can I do to fix these damn leaves? Sorry I forgot to put this in the original post.