Phalaenopsis species problems

[Neverend]

I have a few problems with my phalaenopsis species, hope you guys (especially those who grow these species) can help..

Phal equestris:

I mount my equestris on a slab of fern bark with some sphagnum moss on it. It's growing roots and has a keiki growing on its spike, however, I have a problem of it losing it leaves. The bottom leaves just start to dry up, which is a problem for me since the mother plant only has 3 leaves left at this point. It's been under bright shade, but I've now moved it to slightly brighter shade, any other steps I should do to prevent it from going bare?

Phal bastianii:

I mount my bastianii the same way as I do with my equestris, it was growing, but now it just stopped, any idea what I should do? Similarly I brought it out to slightly brighter shade.

Hope you guys can help me...