Powder Blue Tang

[moondoggy4]

I have this PBT for about 7 years now and is has big as my hand and thick as my my hand. I feed very heavy, I vary the diet between Ocean Nutrition Brine Shrimp Plus flakes, New Life Spectrum Pellets and New era Algae Pellets, frozen food San Francisco Bay brand Spirulina brine shrimp and mysis shrimp. I noticed two nights ago he would not eat the frozen food at the last feeding and this morning he would not eat the New Era Pellets, he has always been hungry and always eats when food is there, so his behavior has me worried no outward signs of disease, does not shake his head, not heavy breathing.
My salinity is 1.23 the last fish I put in is a Orchid Dottyback that was tank raised and I had in a observation tank for 6 months and he is doing well. I have not used any kind of medicine. Any thoughts or suggestions will be greatly appreciated.

 

[Mrscribbled]

Old age is the only assumption I can make, with the info available.

 

[moondoggy4]

Thanks I changed up the food this morning brine shrimp and seaweed he/she is going for it, so that is a good thing, I had this happen before w/ my Aust. Harlequin Tusk he quit eating and in a couple of days he was dead. Also big eater and very fat. His coloring was off on one side of the fish prior to dying.