Re: NANFA-- fish parasites

Christopher Scharpf (
Mon, 11 Nov 2002 09:37:08 -0400

> My crappies have some kind of bacterial or fungal infection that seems to be
> slowly eating away at their caudal fins. I have no idea what it could be,
> what with being fairly clueless and all. My best guess was to treat with
> Paragon, and to throw in some extra tetracycline that I found way in the
> back of the fish cabinet. The infection doesn't seem to be getting any
> worse, but then again doesn't seem to be getting any better.
> I've been treating for about six days now and I dose with the last
> tetracycline tablet tomorrow. Please tell me what to do, so I can avoid
> going out to buy more tetracycline on my day off.

Sounds like tail rot, a bacterial infections, probably brought on by poor
environmental conditions and/or stress. I use Maracyn-Two for tail rot.

Martin Moore, in his upcoming "Three Questions, Moore Answers" column for
American Currents recommends antibiotics in the nitrofuran group, which are
widely used in aquaculture and are absorbed well by fishes, as opposed to
many other popular antibiotics such as tetracycline, which may be effective
only topically.

Chris Scharpf
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