Scolymia not looking good

[Nicksal]

Had this scoly in the same spot for about 6 months now and it has been sick looking for about a week. Water parameters are looking good. Ammonia 0, ph 8, nitrate .10, nitrite 0, temp 78.3, phosphate 0, salinity 1.026. Calculate 500. The scoly is usually puffed up like a baseball and he has been deflating for a while please help if you know anything I can do to help.

 

[T-J]

Alk, calc, mag?
Zero nitrates and phosphates?
Any chance it's being stung? Is that a nem or elegance next to it?

 

[Nicksal]

9 dkh, cal 500, mag 1300
I had a local fish store test it and they said 0 phosphates and 0 ammonia but I did two 15% water changes 3 days apart when I noticed it not looking good.

It's a bubble tip anemone like like 4 inches from it, I will probably move the scoly today maybe that will help it.

Thank you for your help

 

[Nicksal]

9 dkh, cal 500, mag 1300
I had a local fish store test it and they said 0 phosphates and 0 ammonia but I did two 15% water changes 3 days apart when I noticed it not looking good.

It's a bubble tip anemone like like 4 inches from it, I will probably move the scoly today maybe that will help it.

Thank you for your help

 

[ClownSchool]

Your calcium is pretty high. Your ceiling is 460, but you should be closer to 400-420.