splotchy phal leaves

[VickiC]

Hi everyone,
Could you please tell me what you think has caused my mounted phal leaves to have became splotchy/mottled? They appear somewhat 'water-logged' in spots, but are not quite so much when touching them as they appear. They are also more droopy and shriveled than they should be....a look of not enough water or nutrients getting to them.

I mist the roots usually once-twice daily with the same fertilizer/water that I soak my potted phals in. The potted phals do no have the same leaf problem. They look healthy. The exception to my watering regime is the forth week during which I mist them with clear water each day.

All four of my mounted phals looked healthy and bloomed nicely in the late fall/early winter, but their health began to slowly decline afterwards. I assumed that they had basically 'bloomed themselves to death' and would snap back, but they didn't.

All four phals had developed a healthy root system, but look rather shriveled and dessicated now. Being late Spring/early Summer, I have been hoping that new roots would take over and supply the plants with what they need, but few have grown.

I will appreciate any advice. Comments welcome, as well.
Vicki