pumping xenia not pumping

[BCOrchidGuy]

My xenia used to pulse sometimes, sometimes not. I coulld find no rhyme nor reason to the differences. Somedays the Xenia looked like it was going to melt but next day it was big and bold as ever.
I had mine is a very high flow area and it grew like gang busters, as did my Anthellia. I've read they require iodide but I never dosed it, I just did my regular water changes and they did very well.

Doug