Dying Cambria

[Cambria]

This is my first post on this forum and, unfortunately, not a very happy one.
I few years ago, I bought a very beautiful Cambria, on a local supermarket. It is my first orchid. So, I probably didn't care the plant on the right way.
It was getting several new plants, and the main pseudobulbs were dying of. So, I decided to separate the good ones from the bad ones. To do it, I needed a new pot and something to get the plant into. I decided to buy a bag of what they called orchid soil. It turns out that it was more soil than more coarse material. Unfortunately, I didn't know that this soil would be bad for my orchid.
After a couple of months, everything was dying. So, I started to google on the subject. It turns out that it wasn't a good substrate for orchids.
Now I got a new substract and the new pseudobulbs are happy now, with new pseudobulbs and several new roots growing.
Now I am worried with my old orchid. Even being on the new substrate, they keep looking not good. The roots are rotten.
I need advice on how can I make it to get new roots. The bagging method should work?

[Leafmite]

You could try this. Is the pot too large and the substrate not drying completely? Rotting roots usually indicate a need for more air around the roots, a faster drying/draining situation, and less water. I had trouble with rotting roots and now I use rock as a substrate for most orchids and mount the others. After 5 posts, you can use pictures to help us see the problem better. Good luck!

[Cambria]

The substrate is adquate, now.
I water them once a week, sometimes more than that, sometimes, less. Depending if it is hotter or coller. Basically, I check the substrate to check if is is dry or not.
The others are growing fine. It is just this one that I can't make it grow new roots.

[Leafmite]

I do not know, then. Hopefully someone else can help.

[WhiteRabbit]

Glad you four d us!
If there are some fairly healthy psuedobulbs, I would care for it normally. The old pbulbs won't grow new roots, but hopefully there will be new growth which will with a bit of time grow roots. Oncidium alliance are usually very resilient.

[Cambria]

Thanks for the info.
The pseudobulbs are farily wealthy. I'm going to continue to take good care of it, and hope it gives new growths.