A little help please

Hi guys this is my first post but I have been surfing the forum for a long time now. Just started my first grow and everything was fine until now. The leaves are curling and wilting...Take a look at the pics...thanks guys i appreciate it.

flush/flush and flush w/6.0 ro water.

What led to this? Indoor or outdoor? Are u overwatering? Underwatering?

What are your Temps if inside??

They are heavily overwattered and i would bet your ph is off a bit too. let em dry out and ph your water 6.5-7.0 for dirt or 5.5-6.0 for hydro.

Its a root system issue prob from overwatering.