CichlidFish.com - Fish That Think.

Hope someone can help. I have two oscars and have moved them to a bigger tank which was second hand. one of the oscars wasnt happy and as the other one was healthy and happy I thought he was just sulking. but its been over two weeks. I have given anti internal bacteria medicine but he just sits there. he looks so ill.
Please, if anyone knows what i can try....

Very little information to give you any advice. Can you post your tanks ammonia, nitrite, and nitrate values. Also how did you do the transfer, it may be you injured the one O at that point. Did the new tank get clean well? Did you cycle it before adding the fish? why do you suspect the O has an internal bacteria.
Post back.

this sounds ike the same thing that my o had. does it try to swim about but thud down to the bottom of the tank a lot? as if he has swim bladder problems?