Growth on caudal fin

[Cumb Dunt]

Hi guys

Yesterday, I purchased 8 wild rams from an LFS. He said they had been getting mostly live black worms (tubificids?), brine shrimp, and a little flake.

Anyway, they all look great except for the big one, who seems to have a tear in his caudal fin running laterally between its central rays. The fin tissue on either side of the fissure is whitish, I would almost describe the growth as cottage-cheese like. It doesn't look like fin rot to me, but I've only seen "fin rot" a few times.

Anyway, I'd like to know if anyone knows what this is, and what I should do to cure it.

I added some amoxicillin per directions but I have heard neomycin works best on fin rot (if that's even what this is!).

Any help would be appreciated

 

[fishgeek]

clean water and appropriate proprietary fish medications for external infections(fungal/bacterial) all work very well
if it is simply a secondary infection then they will settle very quickly once clean water and stress has beeen atteded to

your description does not match my expectations any chnage of a photo?
it maybe something other than the common simple secondary infections

andrew

 

[Mike Wise]

It is my understanding that gram-positive antibiotics, like penicillin, amoxicillin, & neomycin, are ineffective against most bacterial infections on fish. These bacteria are mostly gram-negative. Is this true, or an "old wives tale"?

 

[fishgeek]

that is still the scientific stance
though pencillin has been advocated fro some infections it is generally thought that the majority of fish pathogens are gram negative

andrew

 

[Cumb Dunt]

I work at an LFS and I find that Neomycin is very effective against "fin rot".

However, this does not appear to be "fin rot". Parts of the infection are almost globular, not just a ragged whitish edge like regular fin rot.

I will do daily water changes until someone can recommend something else.

 

[fishgeek]

my suggestion is a picture

lymphocytosis,carp pox, pappilloma,white grub.fibroma.dermocystidium
are all possible's for raised masses

andrew

 

[Mike Wise]

My experience with gram-positive antibiotics is that they do not work any better than several water changes with some cleaning of the gravel. The fish's natural defenses do most of the work. Oh, I have some experience with diseased fish since I've worked in both retail & wholesale fish operations. The fish would come in with some of the most amazing diseases!