help my babies

I got 5 clones on monday the 11th and put them in the ezclone machine tan substance formed on bottom. I cleaned out completley and refilled. Everything seemed to be fine ph is 5.5-6.5 and the room temp is about 80. Now the tops of the clones are turning brown and rolling up. Just use a 75 watt plant grow light. anyone know what could be going wrong!!!
Putfile - Welcome to my homepage! u can see pics here thanks