How to care for this Cattleya?

[Tickolas]

Heya!

Just rescued this cattleya from the bargain bin at my local florist. Never had one of these before, so I'm a bit hesitant. =)

Looks like the empty stalk there has had blooms at some point, but they've since fallen off. The florist told me they just hadn't watered it enough.

So, question one... How often should I water it? The florist claimed twice a week, but that seems excessive considering I have all my other ones (phals, dendrobiums) on a 10-day cycle.

Question two, should I prune the empty stalk somehow? If so, where and how much?