Fish people - what disease is this?

[swolek]

What are your water parameters? What's the set-up like (size, fish, etc.)?

Might be worth a shot to try a different antibiotic since you're going that route. Maracyn 2 isn't going to take care of all bacteria. Try Maracyn Plus or something else. Of course, none will be effective if this isn't bacterial.

[Pareeeee]

Originally Posted by Jinxygirl

are the scales kind of red or bloody looking? Could it be Septicemia? The symptoms seem similar.

Didn't notice anything red on the scales, or anywhere for that matter.

Originally Posted by Deva

I don't know much, but I lost two Roseline sharks myself, shortly after I got them, probably within two months. I didn't notice anything wrong except a slight fading in color the day before. I have kept fish for many years and this was extremely disappointing because they are quite beautiful. I concluded I would not try to keep any Roseline tetras again. They also required a larger tank than I had them in, but I don't think that was the reason they died, since they were quite small.

I don't have any experience with the Congo Tetra.

Other than water changes and medication, I am afraid I would not know what to do.

Roseline Sharks are stinkin' expensive too! Probably not going to be replaced, they were a gift.

Originally Posted by swolek

What are your water parameters? What's the set-up like (size, fish, etc.)?

Might be worth a shot to try a different antibiotic since you're going that route. Maracyn 2 isn't going to take care of all bacteria. Try Maracyn Plus or something else. Of course, none will be effective if this isn't bacterial.

Yeah, I keep thinking bacterial, but it could be viral I don't know. Definitely not parasite or fungal.

My tank is a 33gal, fully planted. Co2 injector, heater and large aquaclear waterfall filter. Gravel substrate. Plant ferts dosed a couple times per week.

Our well-water quality has declined over the last few months and I'm thinking it may have something to do with the problems. Landlord is going to be putting a new filtration system in, but not sure when. :/

Fish include 2 Rainbows, 3 Yoyo Loaches, 2 Angels, 2 Doctor Fish, 3 SAE's, 3 Otos, now down to 1 Roseline Shark, a female betta, and a small catfish I've had for about 7 years.
I've always overstocked for years with no problems, but with the decline in water quality I think it's causing problems. You have to have pristine water conditions to overstock successfully.