I've had my goniopora for about a year now and it's been great the whole way through up until about a month ago. I shifted a few things around in my rock scape and the goni started sulking. This wasn't a new thing for him to do so I let him do it. However he never fully opened back up, and over the course of about 3 days he lost a large amount of his polyps. Now he's stopped losing polyps and is slightly opening up again, but not nearly as much as before. I've no idea what I did wrong here and no idea if I can help him to grow out again. Does anyone have any suggestions?
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