White Bump Neon Tetra face

[Jay80]

Hey, thank you in advice for any advice given.
I added more neon tetras to my tank 12 days ago and noticed one of the newbies has a white lump on its face.

All other fish are healthy, the one with bump on its face seems healthy otherwise. No other white lumps/bumps have appeared.
7 day api melafix given (hasn't done anything).
Tank established 6 month
80L tank

Any thoughts? Please let me know if you need better pictures. Difficult to get the focus when they're moving ?

 

[Jay80]

Water chemistry is always steady as well

 

[Jay80]

Also done a 25% water change yesterday

 

[Colin_T]

It could be a fat lip from swimming into something or the new virus that causes a white lump to appear on the bottom lip. There's no cure for the virus and you leave the fish till it can't swim or eat properly, the euthanise it.

 

[Jay80]

Thanks Colin! Just put anti fungus treatment in. A few of my harlequins have got white under their lip. Hopefully it isnt the virus ��

 

[Colin_T]

Rasboras don't get the virus. It's only seen on neon tetras and cardinal tetras, more so on neons.

Post pictures of the other fish.

It's not fungus.

 

[Lissee]

This is caused by columnaris. It is a fungus. I had this happen to my neon tetras too.

Its called cotton mouth disease. Not alot you can do but you can try tri-sulfur and regular water changes to give them a chance. good luck

 

[Fishfur]

Is there any way you can get a clearly focused image of the ‘bump’ on the neon and on one of the other fish?

If it’s Columnaris, it’s a serious bacterial infection caused by Flavobacterium columnare and if it’s not appropriately and quickly treated it can be fatal and it is contagious.

Fungus and Columnaris look quite similar early on but fungus is easily cured and Columnaris, not so much.

If it’s caught early enough, dousing the area in Methylene blue, full strength as it comes from the bottle, has cured early cases of it. This can be combined with some salt in the tank which makes osmoregulation easier for the fish so they have more energy to use to heal, but if it does not work you need antibiotics and some good luck to cure it.

This is not something that can wait. I am sorry to say it, but if it is Coiumnaris, it will kill the fish if you don’t treat it right away.

 

[Andy Sager]

This is caused by columnaris. It is a fungus. I had this happen to my neon tetras too.

Its called cotton mouth disease. Not alot you can do but you can try tri-sulfur and regular water changes to give them a chance. good luck

Unfortunately, this is not a fungus and Columnaris is also not a fungus. There are actually 4 strains of bacteria that are classified as Columnaris. Since this is an older post, the fish would be dead by now if it were Columnaris and had not been treated.
There are new viruses and diseases coming out of some fish farms so we can't quickly jump to conclusions based on the older diseases.