New Rainbowfish And Worried

[DTLP]

Just wondering what to do, I bought some new Threadfin Rainbowfish last Tuesday and as I was watch them yesterday I noticed that one female has got a damaged tall fin. As far as I can remember all 6 fish (3 male and 3 female) were ok when they went in the tank last week (don’t have a quarantine tank at the moment so went straight in the main tank).

I’m worried that it might be fin rot and if so how can I tell and should I do some think now instead of waiting and seeing? I don’t want to lose any of the ten other fish in the tank.

Thanks x

 

[Rynofasho]

Hard to say without pics. Just do what you can to keep the water clean, and if you have fish that can tolerate salt you may add a little (not sure if it will harm Rainbows).

 

[DTLP]

Hard to say without pics. Just do what you can to keep the water clean, and if you have fish that can tolerate salt you may add a little (not sure if it will harm Rainbows).

Thanks for the reply, I've tried to get a picture but my camera not good enough to get a good shot of any of the fish and the rainbows are so small and quick. I've tried to get a better look today, the damage is not throughout the length of the fin it seems localised to a small area. If the fin was hair I'd say it would look like it’s been separated by gel, the rays of the fin are missing, that the best way I can describe it, sorry.

From what I've read of fin rot the membrane between the fin rays degenerates, leaving the rays sticking out unevenly. I'm just not shore weather this is what my fish has got or weather it might have be nipped by another fish. I've got 6 Loaches (3 Chains and 3 Zebra), 3 Otocinclus, 1 Blue Phantom Pleco and the 6 Threadfins in a 128l tank, I don't know if any of them are the culprits.

I clean the tank out twice a week, 20 to 30% water changed every time as I've got a Brown Algae problem, will this affect the damaged fish?

Regard
dtlp

 

[drobbyb]

What are your water test results for ammonia, nitrite and nitrate? Often a small ammonia problem can cause a rainbow to become more susceptible to disease.