Cinta,
I'm not sure though what happened with my 'Spider Plants,' it could very well have been too much water (I'm beginning to think I do overwater). They just never seemed to take off, let alone do what 'Spider Plants' are known for (exploding). If anything, they kept losing leaves and I ended up with less than I started with. I always assumed it was poor lighting. Now I'm beginning to think my bad luck with my houseplants wasn't necessarily the lighting after all. Well, poor lighting and overwatering is a death sentence, so maybe it's bad lighting too.
Yep, I'm pretty sure I killed my 'Snake Plant' by overwatering (which I don't think my poor lighting helped). I just bought a ZZ Plant last week... hoping I won't kill that one either. I bought a clay pot just in case.
I could never figure out Orchids either. I was afraid to let them go too dry so I think I inadvertently killed them by overwatering.
Planto