New Acan - tissue receding

[nomar5050]

Hey All

Got this Acan on Sunday, and the head that’s not looking good was the biggest one when I bought it.

Dipped in Coral RX on Sunday, did an iodine dip earlier today.

All other corals look good

Any other thoughts on what I can do to stop the tissue loss?

Salinity- 1.025
pH - 7.9 (always struggle to keep pH up)
Alk - 9.5
Calcium - 400
Magnesium - 1300
Nit - 4
Phos - .4

The first picture is when it was outside the tank after the iodine dip. Second pic is when it’s back in the tank

 

[TX_REEF]

phosphate and nitrate are out of balance, you generally want ~1:50 ratio of therabouts of N to P, you could work to correct that, probably by reducing P as it is a bit elevated

However, Acans/micromussa in my experience are quite hardy, and I would suspect it is getting too much light or direct flow causing that recession. Your numbers are good enough that I wouldn't expect chemistry to be the cause, especially if your other corals are happy.