I bought a very similar spider plant recently - like mine, yours looks closest to the Variegatum cultivar here:
http://www.ourhouseplants.com/...
I own a Calathea too. I keep it in my bathroom, where it gets some mottled light and lots of humidity. I've now repotted it in stages from a 10cm pot to a 30cm pot over the course of a year or so, so it seems to be working!
