Please Help I Don't Want My Girl To Die

please help i think my plants have some kind of problem i have took all the nutes out of my water just like someone had told me to do they started to look better but today when i got home from work there was new leaves that had taco shaped what is going on i don't understand what is happening please help

Need more info on your opp.

Plants are starving though. Could be locked up due to PH.
What temps, PPM, PH, water cycles are you using. I've also seen similiar plants affected by fungus nats.
Anyways get at least 700PPM in your res right away to maintain at around 5.7ph.