Help needed with mold and dry bulb on oncidium

[Yevven]

Hey everybody, what should i do with this oncidium? I got her a few weeks ago,immediately repotted with kelpak and a clay pot. She started to get moldy and her pseudobulbs getting worse. Should I repot her with more leca and a smaller clay pot?

She doesn't have much root. The potting mix is mostly leca with a few barks and spaghnum.

[estación seca]

Difficult to tell without photos. It would be highly unusual for a living Oncidium pseudobuld to get moldy.

[Yevven]

So sorry, forgot the pictures.

[Ray]

When roots grow, they optimize their cellular structure for the environment they’re in, and once they’ve grown, they cannot change.

If you then change that root environment, those roots are immediately suboptimal, so will start to fail. That’s why the best time to repot is just when new roots are emerging. Those will be optimized for the new environment and support the plant.

At this point, the best thing you can do is to keep it very warm, humid, and shady, so it won’t lose water at a rapid rate while it grows new roots. Keep the potting medium moist with a 1:250 Kelpak solution.

[Yevven]

Thank you very much for your answer! How much is the recommended watering for a grown but weak orchid? Twice a month? Or I should just stick to once a month?