Do you grow other paphs?
Brachys are not much different.
With niveum, they do well with year around warm temperature and bellatulum benefit from some cool down during the winter.
Other than that, just grow them like other paphs or phals and you will be fine.
Unless your tap water has very hard, distilled water is not needed. It is pure water and you might want to add some fertilizers to it every now and then.