Favia Recession

[SeaSlugTeam]

I recently got a favia coral frag and it's showing really bad signs of tissue recessions.
I got the coral approximately 5 days ago and during the first night, it sent out sweeper tentacles. After the first night, it did not send out any sweeper tentacles but I didn't think much of it. Last night, I noticed that some of the flesh from the front was falling off so I looked at it more carefully, turns out the back side was much worse and the skeleton is showing (picture). It seems to have gotten slightly worse overnight. I've moved it to a low flow and low light area this morning.
Is there anything else that I can do to try and rescue this coral?
Pictures attached.

Water params are:
Ran the params again:
Salinity 1.026
Ph 8.2
Nitrate 2.5
KH 8.3 Alkalinity 2.96
Phosphate 0
Magnesium 1365
Calcium 470

Temperature swings between 79.5 to 84. I'm trying to stabilize it but I don't think temperature swing would cause such an effect. I also have a blastomussa merletti that is not opening as widely. The hammer, and 2 acan lords are doing fine.

 

[rt67ghy]

When was the tank set up?

 

[SeaSlugTeam]

Approximately a month ago.
It has 2 small clown fish, 1 cleaner shrimp.
As for coral, there's 7 frags currently:
The recessing favia
2 Acan lords
1 Hammer coral
1 Oregon Mummy Eye Chalice
2 Blastomussa

I think I might have been too rough with the coral when I was dipping it also. So many lessons to learn / :.

 

[rt67ghy]

Was the tank properly cycled before you added the corals and was there any ammonia in the tank at that time? Also the temp. should not go beyond 80F and corals will be stressed by a temp swing of 4.5 F if it happens every day. Have you checked ammonia recently?

 

[scooter31707]

First, did you give the coral a dip. Second, did you acclimate the coral to your lights? IME, Favias have done best for me in low light, nearly shaded.