Hi,
Like the title says, I'm trying to repot my first catt. I'm putting it in bark media which is similar to what it was already in. My problem is that way more of the roots seem rotten then I expected. All of the roots that were in the previous media are yellow and squishy and many of them have black areas at various points on the length. Many of them also appear segmented. Is that normal? The plant has not shown signs of being dehydrated so does that mean that these roots are still alive? I'm just a windowsill grower so humidity is lower than ideal.
How much of the roots should I take off without shocking the plant? Should I let them be and allow new roots to grow in before repoting again to remove the rest of the bad roots? Also, do I need to cut the roots back to the bulbs or can I just remove a portion of them? The plant has 4 pbs and a large new growth and has never bloomed.

I'd appreciate any help you can give me.

-Jackie