bubble on amgler

[nicolecraig]

Hi
Anyone knows how to treat an angler with a huge bubble on its body. Pictures attached. Im assuming its called gas bubble disease???? If thats not the right name, what is it? I have given it Diamox and nothing still. Hopefully that wasnt a mistake. A little info on him. He was originally in a 90 gallon with a lot of rock and plants. He has had this bubble for about 2 weeks now. He still eats but is a lot slower.
Right now its in a ten gallon tank with no medication. I have no idea what the next move should be.
Any help is appreciated
Thanks
Nicole

http://s930.photobucket.com/albums/a...t=DSCN1247.jpg
http://i930.photobucket.com/albums/a...g/DSCN1246.jpg

 

[b0bab0ey]

Pics didn't come through. Is the fish swimming normally or erratically? Can you catch him? I have a PB Tang that has some kind of intestinal problem and will sometimes swim like he has swim bladder disease. When he does this I put him in a fish trap, feed him peeled boiled peas and a few days later he's fine again.