I had it about 2 days. My selinity level dropped. I think it died and the hermit crabs may have been eating at it. I am running the light that came with the coverIt doesn't look good. I can’t be sure But based on only the one pic I’d say it is heading that way. If you answer the questions below it will be easier to help.
What kind of lights do you have?
What are your water parameters?
How long have you had it?
Slow decline or fast decline?