Need help identifying CPD celestial Pearl danio

[DinoLaur]

hello,

would someone please help me identify the cause of death for my celestial pearl danio? I’ve had him for at least 2 years now, along with two others who died about a month ago, maybe a couple weeks apart. They were living with 4 other penta-barbs (the barbs and danios were all brought home around the same time). All the other fish in the tank appear to be healthy and well, eating normally. 29 gallon tank fully cycled (established for years), ph about 7.0. This fish only showed signs of being ill yesterday and passed away today. This morning he was hovering towards the top third of the tank which was unusual and would slowly sink backwards if he wasn’t actively trying to swim. Thanks for your help and input!

 

[KayBee3]

I don't see anything apparently physically wrong with the fish, so its possible the fish just passed due to age. They really only live 3 to 5 years, so if the fish was already a year old when you got it, it may have just lived its normal lifespan. In order to ensure it wasn't anything else, could you tell us your readings for ammonia, nitrite and nitrate?

 

[BlackOsprey]

I don't see any weird lesions, and I'm sure you would have mentioned pineconing if you had noticed it. I'd chalk it up to old age too.