Yesterday I noticed one of my harlequins has a small patch of cottony white fungus on his chest under his pectoral fin. He also sometimes stops swimming and sinks and starts to roll over. I've had him for about two weeks. I researched it on the web and it looks like it's a fungal infection, which the sites said is not contagious, but rather a secondary infection resulting from some kind of initial stress/abrasion/etc. My water looks good - 0 ammonia (maybe a slight green tint but nowhere near 0.25 ppm - the first interval on my test kit), O nitrite, ~5 ppm nitrate, and none of my other fish have any visible fungi. I did have two of the rasbora jump into my filter the first night, and it was a real struggle to fish them out, so maybe he cut himself then.
Anyway, what should I do? I'm hesitant to add any medication to the tank, but maybe there's a good fungicide that won't have any bad effects on the tank. I tried to fish him out to maybe try a salt bath (just in a bucket - I don't have a quarantine tank), but too many hiding places made that impossible.
Thanks for your help.
Anyway, what should I do? I'm hesitant to add any medication to the tank, but maybe there's a good fungicide that won't have any bad effects on the tank. I tried to fish him out to maybe try a salt bath (just in a bucket - I don't have a quarantine tank), but too many hiding places made that impossible.
Thanks for your help.