What does the medium look like? The way the roots are growing out of the thin slits, I would be afraid they will cut the roots. I would cut the pot off with scissors and re-pot with fresh mix.
The medium is definitely bark, but not like it's worn down or anything. I will probably repot when it stops blooming. I mean, the picture is after I cut off the dead roots; there were a bunch of really dead ones at the ends of the healthy ones poking out of the slits in the pot