man what is wrong with her i cant decide

ok so i put a few pics on here of my little lady
im not sure what is wrong with her but she had these problems when i picked her up from a friend
almost all the first growth has died except for whats new on top
and the nodes have been growing back for somewhere around 2 weeks
the older leaves turn yellow bend and then turn brown and cruble
the newer leaves have the very tiny tip turn yellow

i also have another one just like her but needs to go to a ICU
completely bare cept for the top and there are like 4 small leaves

hopefully i can get some help
as i need the clones desperately

Type of lighting?

Nutes?

Ph?

Temp?

You have to give us info. Tell us how the plants are treated.

And show us pics of all the plants. Let us see how all your plants are looking. Even if they are healthy.

5 26 watt 6500k cfls
watered when soil is dry an inch down with bottled water, havent got a ph tester yet
they were on 24/0 light schedule until i read somewhere that said stressed plants recoop better in darkness and changed to a 18/6 schedule
no nutes, fox farms soil