Naso tang not acting right

[Brettinteriors]

I have had a medium sized naso for roughly 6 months. He has always eaten like a pig and has grown well. I noticed he wasn't eating today and his stomache has a pintched look. He is not active. My water is rock solid. I do not use a calcium reactor and have good orp. I have not changed anything in the tank and he is not being picked on. Nothing else is showing any signs of distress. The naso has no obvious signs of ich, velvet, hlle, or Popeye. Any suggestions or advice.

Just so I don't get water param questions
Via Hanna

Alk 8.3
Cal. 450
Mag, 1380
No3 10 or less
Po4 .03
Sg 1.026 refrac
Amon 0
Nit 0

 

[revhtree Verified Admin]

Weird. Do you hang nori or another seaweed for him to eat on?

 

[Brettinteriors]

Weird. Do you hang nori or another seaweed for him to eat on?

Yep, right by him. Normally he would devour it.

 

[revhtree Verified Admin]

Sorry but doesn't sound good at all. Have you tried a variety of food or soaked the food in garlic.

 

[xcorallusx]

what is your ph?