Help with Vanda

[tanira2]

Hello,
I would really like some help, i was given a blue Vanda for a present it is in a wooden basket which is then in a big glass vase (as shown below)






But i need some help with caring for it, how often should i water it as it doesn't have any compost and again how often should i feed it (and will an ericasiouse feed be ok for it diluted?).
Any advice would be great because it is such a beautiful plant i don't want to kill it.

Thanks for any advice any one has