Bad drooping.. With PICS...

Hey RIU.. So i decided to do a little flush for my plants.. and about 24 hours later one seemed to be acting a little strange and drooping pretty bad..
Im not sure what to think because the other 2 plants i flushed the same way still look perfect..
Maybe its just the strain reacting differently..
I have GrapePunch Sourbubble and Purple Kush.. and the SourBubble is the one thats not looking so good..
heres the pics..





Can Someone tell me Whats happening to them?

im thinking either a mag def or overwatering.

could be overwatering or underwatering..

Definetly a problem with watering.

Well, i hope she recovers.. =(