bulbophyllum dayanum 'red' problems??

[Kreinalexander82]

Hey. I collect mostly bulbophyllums here in Florida. My greenhouse reaches into the 90s often in mid day and they seem to be totally fine as long as my humidity stays high and there’s decent air movement. What are the levels in your terrarium?? Do you have good air movement in there? The rings on the leaf pic makes me think bacterial problem. I’m sure someone will have the total opposite opinion but from what I’ve seen with my plants that’s my best guess.