[Cynthia, Prescott, AZ]

I would not use sphagnum moss for a Cymbidium, absolutely not. The best is fir bark, from fir trees, and a mixture of sizes, so that the smallest particles help to hold moisture. I would npt repot it again. Its poor performance right now may be because it was repotted, or because it has not had enough time after repotting to show you it is happier. Regular pine bark will degrade much faster, and may have some fungi spores in it that will also speed up decomposition. But don't worry about it now, it will just have to be repotted a little sooner.