Sick yellow tang

[shark230]

I have a 58 gallon reef tank for 20plus years. At present I have much coral a 5” yellow tang and a royal gramma.
my yellow tang keeps moving head up with gills flailing. Water change yesterday of 10 gallons. Noticed it a week ago. Thought it was getting algae from a rock. It gradually increased. Now is pointed up more now than earlier. No spots on tang

 

[Hugh Mann]

It's always helpful to post as much information as you can. Temperature, salinity, every water perameter you can, any recent additions, livestock, inverts, coral, etc?

@Jay Hemdal

 

[shark230]

Temp74.8. 10 gallon water change yesterday. No phosphate. Kh 7
Salinity 1.024. Didn’t test nitrate due to recent water change.
stress?

 

[nereefpat]

That looks like bad news, unfortunately. How long have you had the tang?

 

[Jay Hemdal Verified Community Expert]

Temp74.8. 10 gallon water change yesterday. No phosphate. Kh 7
Salinity 1.024. Didn’t test nitrate due to recent water change.
stress?

That is unlikely to be related to water quality if the invertebrates are all doing well. Can you post a video? (taken under white light is best).

Jay

 

[Zionas]

If the Yellow Tang’s your first fish and you’ve had it for over 20 years, could be old age.

 

[shark230]

That looks like bad news, unfortunately. How long have you had the tang?

One and a half years. Too small of tank? Stress?

 

[Zionas]

May well be stress from a small tank.

 

[shark230]

Yep .

 

[shark230]

Thanks for info from everyone