Swollen Tail

[Rex740]

One of my neons has a swollen tail. Is this contagious?

 

[WILDER]

Need alot more info.
Size of tank in gallons or litres.
How many fish and which type.
Water stats in ammonia,nitrite,nitrate, and ph.
Has he lost his colour in the red stripe area.

 

[Rex740]

My signature says a lot of info.

 

[Tolak]

It says some info, but not enough please answer these questions so we can help you.

pH:
ammonia:
nitrite:
nitrate:
kH:
gH:
tank temp:

Fish Symptoms (include full description including lesion, color, location, fish behavior):

Volume and Frequency of water changes:

Chemical Additives or Media in your tank:

Tank inhabitants:

Recent additions to your tank (living or decoration):

Exposure to chemicals:

Digital photo (include if possible):