Cymbidium yellowing and has green splotches on leaves

[Roberta]

Also a comment about the LECA medium... you may be challenged to keep it wet enough. Cyms need to stay damp. I use small bark, and water every two days in summer, 3 days in winter. So unlike many orchids, these do not want to dry out ever. During the growing season they are heavy feeders, I give them some time-release fertilizer in the spring to supplement my regular light fertilizing, which is not sufficient for the Cyms.

While Cyms can grow epiphytically, they pretty much grow more like terrestrials. Well-drained but water-retentive medium.

Don't disturb it now, but in the spring (when you see new growth) you may consider repotting into bark.