Red Digita help

[Montaquelaveist]

hey guys i recently obtained a Red Digita about a 2 months ago and recently i lost all my zoas due to a piece of aluminum falling into the tank but i also noticed that a few of my sps were starting to recede from the bottom up since the removal of the contaminant all but the red digita has stopped receding all my levels are good and he seems to be the only one still affected is there anything that i can do he's the only sps that i can place on the bottom of my tank that would do good i don't wanna loose him but i don't know what else to do i used a couple of pieces of poly filter to remove anything harmful left in the tank and did a water change right after the removal so I'm at a loss any help will be accepted i also dosed restor from bright well to try and help

Here are my levels as of 10am today

PH 8.54
TEMP 78 Steady
ALK 8.3 - 8.9
CA 475
MAG 1400
NITRATE 10PPM
NITRITE 0
AMMONIA 0
SALINITY 1.025
PHOSPHATE 0


Doing my weekly water change tomorrow 20% tank size 120 long