Please help!

[Mrasap]

http://postimg.org/gallery/1s6ggvyog/5612a5e2

Can someone please tell me what to do?
First two pictures are taken before 5 days, last ones today
and i dont know whats wrong with my autos. They are jack herer about 2 -3 weeks old. Can i recover them? They have been 24/0 under light, some of leafs are dry, what can i do to dont let them dye?

 

[Mrasap]

If you need more pics, just tell me

 

[aridbud]

It appears maybe soil is water logged not providing good root air circulation?

What are you feeding them? Let pots dry out a bit before watering. If using nutrients, use only water next watering. Tips dry can mean water loggee, over fertilization.

Too, are you keeping them in the smaller pot throughout? They may get root bound.

 

[Mrasap]

im feeding them nothing, soil was almost totaly dry, so i watered them today. could it be becouse of bad air circulation, cause i have no fan. what do you think will they recover?

 

[hitmanjay99]

Im quite new but with what i have picked up along the way reading online ... i would only water once every 3 day or 4 day .. and not a massive amount either ... also i would sugest 18 hour light 6 darkness as in real life these plants need some darkness to recover and they seem to grow during the dark process when lights flick back on you realize they nearer to the lighting ...

 

[Mrasap]

okey i will try to put them under light for 18 hour