Is there such thing as "wasting away"?

[|squee|]

I bought 6 Rasbora Kobutai 2 months ago.

At first they were healthy, swiming around very actively. Then, one by one they started to drop dead. This continued till there were only 3 left.

Then last month, one dropped dead. Yesterday another one dropped dead, and today I found the last one floating at a corner of my tank.

The puzzling thing is that my espeis and otos are all fine in that tank. And the symptoms will always be the same: stuggling to swim, with a sunken stomach, and then the next day dead.

I remember reading about schooling fishes who "waste away" when left in small numbers. Or is there no such thing, and it's actually poor water conditions? But I don't understand, if the latter is true, why aren't my other fish dropping dead, like my boraras briggitae and trigono. espei?

Thanks.

[benny]

"Wasting away" or emanciation is one of the symptoms of a few condition, including internal bacterial infection, worm infestation (internal parasite) and Fish TB. Due to the size of the rasboras, it's very hard to nurse them back to health. Best to isolate them for treatment so that they do not spread it to the other fishes.

Best to quarantine new fishes before they going into your tank if the space permits.

Cheers,

[ranmasatome]

Actually relatively speaking, R. kubotai is a relatively sensitive species...they do quite well in an aquarium when all is fine but when something screws up... they will be among one of the first ones to show signs of it.. This is probably also one of the reasons why they don't really ship well...

[hann]

I used to keep discus and one of them did not eat for a long time. It didn't pass away str8away but it becomes thinner as days go by. Till one day, it died. It really live for months before it died.