Favia dying

[Perthegallon]

just got this favia few days ago may be from the stress or being stung by a hammer coral but I’m seeing a little tissue issue no issues on my other 6 favia corals from the same shipper and dealer

Wondering if I should do an idiom dipe or leave it alone and let it heal?

Nitrate is 5
Phosphate is 0..04
Temp is 76
All other levels kept at black bucket Red Sea

 

[Perthegallon]

Bump

 

[Lavey29]

So move it away from the hammer into moderate light and flow. Raise nitrates to 10 and phosphate. 05 to .1.