Receded Hammer

[reefpatrique]

Had this hammer head for coming up on two weeks now. Never fully came out and day by day showed increasing reticence to opening. Parameters:

Alk: 9dkh
Sal: 1.023
Nitrates: close to 0ppm
Phosphates: 0.10 ppm
Cal: 320 mg/l
My: 1250 mg/l

Other corals doing fine, including a blasto. I do have some cleaner shrimp, but have not seen them on the hammer (though I wouldn’t put it past them to be picking at it when I’m not looking). Any thoughts? The right head in the pic was gone when I bought it; left head was vibrant at the LFS.

Lighting is with Ocean Revive T247.

Any thoughts on saving this guy?

 

[Macbalacano]

Unfortunately that hammer looks like its too far gone :(

Nitrates are too low, you definitely want to have at least detectable levels. Personally I'd aim between 10 - 25.

Calcium is a little low, i'd try to aim for 400 or over

I would also raise salinity to 1.025-1.026

Everything else looks ok, I would keep hammers in low-medium flow and medium light.