Thanks Curt! And cheers Paula
This Xeniid reproduces a number of ways... often fissionary: budding, splitting, pedal-stoloniferous like creeping of tisse.
I'd advice you to pilot a hole in a rock wit a drill bit slightly smaller than a toothpick, then impale the ree-floating frag (and any other cut or caught that way) and spear it with a toothpick into the hole. Cocktail toothpicks work best for this purpose.
Best of luck/life,
Anthony