Man, what a bummer - sorry to hear about your loss! First, I think you need to find why your anemones are roaming so much. An E quad typically will like to find a place w/ medium light, and a place where it can get its foot way back in a crevice. Typically they want a DEEP crevice.
If the anemone goes walk-about it's usually because something isn't to its liking - either water flow, attachment type, or light level. Or sometimes it can be that it's being irritated too much by a big clownfish. Do you have one of those?
Cheers and hope this helps,
James