New Hammer Coral dying? HELP ME SAVE IT

[SomeHappyFish]

This is recession due to stress.
Hammers are intolerant to major swings in water quality, and sensitive to almost any level of copper in the water especially if any tap water was added. Calcium and alk are important parameters that will affect their growth and this coral will start to die off if calcium levels are too low which should be about 400 ppm.
Basically, avoid bright light and water flow and dark lighting. Bright lights cause bleaching and low lighting will cause them to shrink and starve. Maintain moderate light for their photosynthesis and keep it off the sand bed which sand can irritate it.
I suspect your Po4 and Nitrates are elevated and may be causing this - something to check

Salinity: 35ppm
Temp: 78F
Nitrate: 14.2ppm
Phosphate: 0ppm
Alk: 7.38ppm
Cal: 385ppm
Mag:1380ppm

 

[vetteguy53081]

Salinity: 35ppm
Temp: 78F
Nitrate: 14.2ppm
Phosphate: 0ppm
Alk: 7.38ppm
Cal: 385ppm
Mag:1380ppm

Some strong possibilities are:
Calcium slightly low
Alk low - At least 7.8
Phos at zero is a big one. raise SLOWLY to at least .05

 

[crabgrass]

Some strong possibilities are:
Calcium slightly low
Alk low - At least 7.8
Phos at zero is a big one. raise SLOWLY to at least .5

Your experiences way out weighs mine, but did you mean .05 or .5?

 

[vetteguy53081]

Your experiences way out weighs mine, but did you mean .05 or .5?

.05. I already fixed it

 

[SomeHappyFish]

Some strong possibilities are:
Calcium slightly low
Alk low - At least 7.8
Phos at zero is a big one. raise SLOWLY to at least .05

Yeah am working on raising phos but feeding more did nothing this week.

 

[vetteguy53081]

Yeah am working on raising phos but feeding more did nothing this week.

I raises slowly. If running a skimmer, turn of temporarily and extend water changes