Sick bta?

[christa55]

Hallo all. My anemone ive had for months never took off. It was open once. But ever since he has been hiding in the dark. Ive tried feeding it but it does not accept.
Corals such as goniopora are thryving.

About two months ago i used dino xal could this still be the problemen?

 

[Dom]

How old is the tank?

 

[Gumbies R Us]

Need more information about your tank
Flow
Light/PAR
Parameters
Anything that could be bothering it