Acan lord closed?

[Gianluca]

hello all! I got an Acan about 3 weeks ago, it’s been doing well, but today when I came to check on it was closed up and dark, the other corals in my tank are all doing great, but this one isn’t doing well. I attached a photo, please let me know if you see any issues

 

[SPR1968]

We might need a full set of water parameters to see if we can help here and possibly a clearer picture