Bob, maybe I can answer that in a few months.
Tony, I have a lower flow crevice at the bottom of the tank that allows it's disc to be hidden from direct light, while alllowing it's body to be out in the open. It looks like it's attached now, and if attaching is a sign of health, this guy is healthy. It attached inside the bag and was a real pain to get out!!
Took me about 15 minutes and a pair of sissors to release it.
I'll post a pic of "home" in a little bit