Xenia bleaching and not moving

[scope2reef]

Suddenly this morning I see Xenia turned white and are not pulsing. Yesterday for some reason the temp dropped to 72 F. I raised the heater setting and got it up to 76 F. Its extremely cold in Alberta now. Is the Xenia affected by the temp drop? The water is also a little bit cloudy, never seen this before. Previous water change was a week ago. Will do water change today. Any help is highly appreciated.

 

[Tahoe61]

It was probably the temp drop, but I would run chemistry. SG, Alk and Calcium.