It may be rot, but I'm not sure. Orchid potting medium is almost always misleading. Almost everyone who has orchid problems, I find, has them potted up in sphagnum moss (including me). Sphagnum retains a lot of moisture making it almost too easy to overwater.

Orchids are epiphytic, meaning they grow on and cling to trees. You can imagine how much rain water falls to the ground as opposed to hanging around the roots. Luckily, there is a good mix that promotes quick drainage and prevents copious amounts of water from lingering around the roots and causing root rot.

The mix:

You can look up Al's gritty mix here on the forum, or just use this rough not too detailed 1-1-1 recipe.

One part Turface

One part pine/fir bark (screened)

One part crushed granite

This mix drains very well, so it is good as an orchid mix, but you will have to water more. With this mix remember to use a pot with a drainage hole at the bottom. If you put a saucer under the pot, use some flat rocks or something similar to prop up the pot in the saucer so the water doesn't seep back into the mix.

If you use Sphagnum moss, I am confident you will run into rot problems somewhere alone the way.

Once again, I am not sure what your problem is, but I really think you should repot.

Good luck!!

~palmsandsnow

Orchid pots need holes on the bottom AND the sides. Lots of drainage..I use sphagnum very sparingly...

Thank you both for your helpful comments. I will look into finding a new container for it and getting it repotted sooner rather than later.

Yes to what Darlene said! Phrags culture is really different than many other orchids. She grows a few and knows what she's doing with them :)

I only have 1 Phrag which is grown in bark and charcoal with a tiny bit of spagh on top set in a saucer of water. Don't let it dry out. I use rain water (or snow) or cooled, boiled water. I don't buy distilled water because I've yet to see any of my plants suffer from the other types I am able to provide.

I have never tried cinnamon, I did treat it with Neem oil as I was not sure what I was dealing with. I lifted the plants a bit that had been buried and that seems to be helping. They are watered with bottled water and the temp is between 60-70 might be an air movement issue. Thanks for all the help I appreciate it.

I don't grow phrags, but, growing in a glass container can not be healthy for the plant. Even though phrags like to always have a moist growing medium, those roots also need air. If it were my plant and there were more healthy leaves on it I'd probably just remove that badly affected leaf and lightly dust the cut area with cinnamon. Good luck with the plant :)