Good news; when I arrived home from work today, the mushroom was spread out over the rubble in the jar. The puff ball things are gone and it's looking much better. I'm going to let it attach to one of the rubble rocks then find a better place for it. No glue this time.

On another note, I've got a baby mushroom growing under one of my other mushrooms. This tank never ceases to offer something new and exciting.