Iuno, looks like the cube is a bit dry but it's hard to tell. I imagine they would be stretching more if it were a lack of light...

There's a chance it's your water - have you tested your PH or is your water especially hard? You might want to try feeding them with distilled+purified water.
MonkeyRacket Reviewed by MonkeyRacket on . What happened to my seedlings? These used to be two perfectly healthy Nirvana Northern Lights seedlings: Seedling 1: http://pixpipeline.com/d/467d1d5ad089.jpg http://pixpipeline.com/d/4227b21bdda.jpg Seedling 2: http://pixpipeline.com/d/617667312762.jpg http://pixpipeline.com/d/1bf371e273fa.jpg Rating: 5