Phrags have to have good water. There must be something in the water that it is sensitive to. I don't know a great deal about water but I do know that. Perhaps watering by soaking or draining it in a sink. There is even distilled though that is controversial. Isn't everything with orchids? The more books I read, the more I think that.

Carol
I have an orchid with brown leaf tips. Discovered that it is sending roots down into the humidity tray below. Tray water has colloidal silver in it to keep nasties from growing in the water.

Maybe keep my chid from growing too! It's always something.....