Hey,
I already knew not to use tap. I use distilled H20 with my D. lotax and this masd.
I unpotted, the roots look great, definitely not root rot. There weren't really any "old" roots to clip off. There were several new growths forming, as well as a new flower stalk.
I cut off all of the affected leaves I could see with 70% isopropyl sanitized shears and dusted each cut with cinnamon.
I repotted in brand new sphag. My plan is to keep an eye on it and see what happens. I am not sure if this is bacterial or fungal...
Here are some pictures of the root system.
