After a few Vanda research, it looked like I got a black rot/bacterial infection. It made sense because it was the first time I ever left my Vanda out in the oak tree and it rained all night. The black rot spread rapidly from less than a pea size to over a quarter size within 24 hours.
I guess it was a good thing I brought it back in and kept it dry, since it has been raining agai lately. This type of black rot (which also affects dens and Catts) can spread rapidly if the leaves are kept wet. The advice is to remove the affected leaves and spray with fungicide, which I don't have.
I removed the affected leaf but I might have to remove a couple more leaves as a precaution because the rot touched the adjacent Vanda leaves leaving some some tiny spec/brown spots close to the stem. From what I can see, the rot has stopped spreading and has not travelled down to the other leaves/roots yet, so hopefully I can get this resurrected.
Indoor we keep our temperature 78 degrees, otherwise our airconditioning unit will run non-stop. We have also fans that are constantly on so they hopefully provide good air circulation.
