Sick Rosy Tetra Please Help

[cozza1980]

hi i have only just started an aquarium and bought my fish yesterday i got 5 rosy tetra and 2 siamese flying fox, they all seemed very happy all day and seemed happy when i fed them for the first time this morning.

later on in the day after being out for a few hours 1 of my rosy tetra is upside down with its fins and tail looking very damaged, i have checked the ph, nitrate,, nitrite, general hardness and carbonate hardness which are all at the correct level, my fish tank is 180 litres so is big enough.

i have took the fish out of the tank for now and put in a glass bowl, i do not have a seperate tank for it.

any ideas on what i should do or what is wrong with it, all my other fish seem fine.

 

[J1mbo]

Where all the fish health when you bought them?? ( any dead ones in the tank at the fish shop?)

Im guessing if all the others are ok and the water is ok that its just an unhealthy fish

 

[OldMan47]

Welcome to TFF. I am glad you decided to drop in and try to learn how to best care for your fish. If I am reading your post right, you just set this tank up.
If that is true,you have made one of the most common mistakes of a new fish owner. The tank needs to have a bacterial colony established in it to take care of the ammonia that the fish produce with their normal biological activities. You can look here to investigate how to do a cycle with fish in the tank. [URL="http/www.fishforums.net/content/New-to-t...esource-center/"]http/www.fishforums.net/content/New-to-t...esource-center/[/URL]
It is likely that you are about to embark on the long process of doing a fishy cycle. It can be difficult and a bit tedious but if you do it right you will end up with a healthy tank that you can be proud of.