K2 sickness.plz help

[damtool]

hi i got some problems growing K2.it started about 5-7 days ago and it looked like i put too much water, then it started to look like over fert and in some way like mg def or ozon burn.
it came on 2/5 plants.the other 3 re well so i m very curious what s up with this two coz they look very sick.i was trying flushing one of it without any effect and i tried feed 2nd with some extra mg but without any +results.they just turning worse.of course the growing process is like 10times slower than with healthy plants

i was growing hawaian indica in the same conditions and there was no problems like with k2 this time.

expreimentally i watering 3of my plants with melted snow (1 of this 3 got sickness)

i dont ve ph counter so i can t check it but if you ve some advice please let me know so i can try to save them.


photos below

http://img402.imageshack.us/img402/8186/p2150030qq8.jpg

http://img526.imageshack.us/img526/4685/p2150034ca1.jpg

http://img172.imageshack.us/img172/1231/p2150037rt4.jpg

looking forward for help

thnx.D