What is this? 3 fish dead!

[fishman1121]

A couple of weeks ago I noticed my swordtail had a bacterial fungus. It had also spread to my candy play and another swordtail. Sadly i realized too late before i treated the tank and the first swordtail and the platy died. The last swordtail was fine until now and it looked like its upper lip was missing and I found it dead nearly 5 mins ago. I noticed this symptom on the other two. I dont know what it is. Please help before it spreads to other fish!

 

[Mumma.of.two]

Can you look up some pictures of Columnaris? Sounds like that could be it. What are your parameters like? What did you use to treat?

 

[jlk]

+1
It definitely sounds like columnaris. If you have any fish remaining, you will need to act fast. Reduce the temps, increase the salinity if all fish are tolerant and treat with a gram negative antibiotic such as kanamycin. Heres some additional information:

Columnaris (Flexibacteria) in Aquarium Fish; Fungus, Saprolegnia; Treatment, Prevention

 

[fishman1121]

The pictures i looked up about columnaris showed a fungal growth on the fish. I did not see that on my fish. Just the upper lip was gone.

 

[Mumma.of.two]

It can show just in the mouth area. I don't want to scare you but it moves fast so treatment is needed ASAP. As jlk said, drop the temp it helps slow the bacteria growth.