What wrong with my toadstool mushroom

[Ches]

I've had this for a year with no issues but all of a sudden it has been extending its polyps and been looking pale. Is it dying? I was told to remove it before it kills everything in my tank.

Parameters are:
Salinity 1.027
Alk 7.7
Calcium 460
Ph 8.16
Phosphates 0.0
Nitrates 0.0
Mag 1320

 

[Ches]

http://reefcentral.com/forums/picture.php?albumid=9561&phttp://http://reefcentral.com/forums/picture.php?albumid=9561&p

 

[Nina51]

can't see the pic.

 

[Ches]