I'm just wondering if they phals are getting too much light on a south window? I would put them in the shakiest part of setup come spring and summer OR use vandals to shade them (evil grin).
They all went through at least one summer in this window with no burns plus i do keep a small fan running 24hrs. Out of 5 phals, 3 are species that I think do enjoy more sun plus my view is obstructed so that tones down the southern exposure.
Very much looking forward to seeing how they do with the addition.