Dead Rummy Nose

[jamie2010]

I haven’t posted in this forum for possibly 10 years, so hello again.
so I bought 12 rummy nose last week, within a week all were dead. All with the same symptoms, developed a pale patch around the dorsal dropped to the bottom and died pretty quickly. For my own sanity can someone shed some light on possible causes please?
tank is a 90 litre heavily planted, been running 3 years and all parameters are spot on.
thanks
Jamie.

 

[Shiverz]

I haven’t posted in this forum for possibly 10 years, so hello again.
so I bought 12 rummy nose last week, within a week all were dead. All with the same symptoms, developed a pale patch around the dorsal dropped to the bottom and died pretty quickly. For my own sanity can someone shed some light on possible causes please?
tank is a 90 litre heavily planted, been running 3 years and all parameters are spot on.
thanks
Jamie.

Are there any other fish in your tank?

A pale patch? was it discoloured, maybe whitish in colour? possibly even yellowish? Did you notice any lethargy in your fish? or scratching at all?

With the speed it took and the white patch, I would hazard a guess at Columnaris disease (aka saddleback disease), though with such little info it's hard to know exactly.

Edit - Where are my manners, welcome back after such a long time away

 

[jamie2010]

Hi, all the tetras were separated for a few days in another cycled tank. Other occupants are a breeding pair of Corys and a breeding pair of rams. There was, and is no other signs of disease in the tank mates. They showed no scratching, The faded patch was a exactly that, faded. Kind of a grey hue. Strangest thing, they all went so fast. They would take ill in the morning and be dead by evening.

 

[Retired Viking]

Rummy nose tetras are more senitive to water chemisty than many other tetras. It is best to add them after your tank is established and has a stable water chemistry (4-6 months). Fading is usually a sign of stress but I do not know in this case if that is a cause.

 

[itiwhetu]

Sounds like what is commonly called neon tetra disease. Runs through tetra populations in quarantine. The importers usually can halt it but it lies latent, and when the conditions are right will reappear

 

[Colin_T]

pictures?