I have several oncids in my small GH, where the temps range from 50š Winter
nights to 90š Summer days, the humidity is set at 70%, and they are fed 100
PPM MSU every week to 2 weeks, depending on the season. Most have been
re-potted within the past year.
They're not doing too badly, and a few have bloomed, but most have yellowing
outer leaves and even PBs. That makes them look unhealthy, though they have
bright green new growth.
Is this just something to put up with, or should I do make some changes?

Tom
Walnut Creek, CA
Nikon CP5700, D70