Problem With Tiger Barbs

[alexiy]

My tiger barbs developed weird behaviour, they float head down in absolutely vertical position, stretch fins and shiver. This can last up to a minute, after that they would swim away as if nothing happend. Everything in aquarium seems fine: ph, amonia,nitrite, temperature. It all began a few weeks ago when I trasfered fish to a new aquarium.

 

[dcarmor927]

i would say swim bladder, which has the same symptoms but if they swim away normally then i think you can rule that out...maybe they are breeding...sometimes before spawning the female gets vertical like that...but i think you would notice if they were spawning...How often do you notice them doing the "headstand"?...maybe someone else has an explanation... good luck