What is happenin to my plants? I'm like this 3 weeks into flower and this started

[California420]

All of a sudden yesterday 3 of my plants started to get really droopy leaves and the leaves ate drying out too... The plants have been treated for powder mold and there isn't any sign of it in room... I'll post some pictures and of anyone could give me dome trouble shooting ideas please let me know... They were doing so well then it was one plant drooping and now it's upto 3 or 4 of plants. Please help if u can
Thanks

 

[GigaGrew]

sure thing. post pics ASAP

we need details.

what grow medium (soil;hydro e.t.c)

what PH is the medium at currently

what food are you giving them.

how old are they

are they in veg or flower

what lights

tempratures

humidity.

were they getting sick before you treat them for powder mold or after, if so how many days after

anything you can answer will help considerably.