[nyala]

Hi soonsuseong,

First, it's definitley N. chaniana.

Second, based on Lee's book, this species is often epiphytic. Like other epiphyte plant (ex. orchid), they like high humidity but good aeration too. So we (some who believe it) use orchid plastic pot that have many hole for ventilation and for media, we use full coconut chip.

Fyi, all my epiphyte neps grow with this condition.

But in lowland like my place, i suggest to add water tray to make high humidity.