My Sailfin Tang doesn't seem right.

[Sacohen]

My Sailfin Tang doesn't seem right.
I got him about a week ago and have been out of town.
I had a friend watching the house and feeding the tank.

He is not swimming much and hanging down at the bottom of the tank.

Water Parameters as of about an hour ago are...

Salinity 1.0265 via Deep Six Hydrometer
Amonia 0 ppm via API Master Test Kit
Ph 7.8 via API Master Test Kit
Nitrites 0 ppm via API Master Test Kit
Nitrates 5 ppm via API Master Test Kit
Phosphates 0.17 ppm via Hannah Checker
Calcium 410 ppm via Red Sea Reef Foundation Pro Multi Test Kit (Ca,Alk,Mg)
Alkalinity 13.4 dKH via Red Sea Reef Foundation Pro Multi Test Kit (Ca,Alk,Mg)
Magnesium 1380 ppm via Red Sea Reef Foundation Pro Multi Test Kit (Ca,Alk,Mg)

 

[Kitsune_Gem]

Just from the photo I can see the lateral line erosion starting to happen on him.

 

[owenspackman]

PH seems a little low and Tangs are very sensitive to low PH.

How's he doing now?

 

[Sacohen]

Seems the same, but it is night, so he should be more mellow than during the day.

 

[Sacohen]

Well, I'm sorry to say that he didn't make it.

I woke this morning to him struggling to swim around and stay upright.
He kept getting suck against the over flow or the wavemaker pump intakes.

Thanks for all the answers though.

 

[triggreef]

How can your ph be so low and alk so high? Is that even possible? Something seems wrong there. Probly not the cause of death of the tang but still.