It is a cool to cold growing species therefore one that most can not handle in their warm to intermediate temperature growing conditions. Yes, I would use RO water and on a regular fertilization program with less fertilizer during the non growth, low light season but that is true regarding any orchid that is not in a growth phase. Just keep it in a lower light situation and on the cool side. It is a fine root plant so don't let it go bone dry.
It is a stunning species...good luck with it!