Can xenia sting?

[robbyville]

I have (had), a small digitata frag that has (had) been growing for at least three months. It has (had) already encrusted its disk and looked great.

About two days ago, I noticed that about 2/3rds of it's flesh was gone leaving only white skeleton. The only thing that I could think of was RTN (Which I do not know much about), or the xenia that is very close to the frag and is growing rapidly. I have definitely seen the xenia touch the frag.

I have moved the frag to a new location but it seems to continue to go down hill. On the two inches of frag I estimate there is maybe 1/4 inch of living tissue left.

Thoughts?

Rob