The Puffer Forum

my amazon puffer has a big big lump on the side off its belly with a red looking sore bit near the end,it was fine last nite and feeding but now it has a pea size lump on it.
its about a inch and a half long and the water is fine,ive tested it.
im really worried and any idears would help

You're going to have to give us more than, "the water is fine,ive tested it".

Please answer the above questions that are in red so we can help you better.

this is her,it has got bigger today when ive been at work,does any 1 no what it could be?.
she is not eating at all,it is a 4ft tank and i will test the water now to see what it is today

Looks like a terrible abscess to me - might require lancing. It could also be a tumor, which you really can't do much about.

PH 7.5 TO 8.0, AMONIA 0, NITRAT 10, NITRIT 0.1.
it come up in 1 day and got a little bigger the 2nd day,it looks like its going to pop.
will my other fish be ok in the same tank if it does pop in there water,do fish survive this kind off thing.
WHAT IS LANCING?

I don't know whether thats a tumor or what, but that nitrite should not be detectable, highly toxic

I would leave it be & treat the tank with Melafix. Start doing 50% water changes every day, until the nitrite remains at 0.

Thank you for all your comments. Just thought I'd let you all know that she's doing much better now. I lanced the cyst and most of the puss has come out now. She still has a little red mark but the lump has nearly completely gone. She's also just started eating today which is amazing.

Are you treating with Melafix?

Are the nitrites down yet?

yeah im treating with melafix and my nitrites are nearly sorted,been doing water changes at 25% a day. cheers

if you still have nitrites i would do 50% instead of 25%

Hi, my pea puffer has something similar. How exactly do you lance the cyst? What do you cut the fish with and how do u get it to stay still etc

This post is from 2008