Xenia is really an odd critter.... some tanks can keep it and some can't... that's the best I can come up with. There never seems to be a repeatable process or method to cause failure.... we've tried, suceeded in some tanks and failed in others.

I'm considering removing all of the macro algae from the refuge on my 25g and replacing it with Xenia as primary means of exporting nutrients...In hope of getting lucky and actually being able to get it started and take hold..