I recently purchased a "pot" of bulbophyllums from a warehouse in Fla. There are lots of Bulbos. Some of the leaves have a light green splotchy covering. Anyone have an idea what it could be? Too much heat? Too much water? No pests that I can see. Bulbos look healthy. I posted pictures in my (first) album. Hopefully, the setting is correct for viewing. Suggestions, please!!!! Thanks.