What is this disease? Is it TB?

I've had this same thing happen to 2 of my fish from this tank a couple of months ago. The fish is bending down and I don't know what is causing this. Right now it is swimming fine but the others were before they got too bad. I'm hoping it isn't TB. I am actually moving the fish from this tank to another tank and I don't my other fish harmed/infected. Any ideas of what may be causing this? It scares me, I don't want to lose all of my other fish but I need to sell my other tank. Help please! Here is the link to the picture of my glofish with the problem. Note: the previous 2 fish that died from this were a swordtail and a guppy.
[IMG]http://i36.photobucket.com/albums/e31/seaturtle27/IMG_4236.jpg[/IMG]

2009-02-08T07:20:50Z

http://s36.photobucket.com/albums/e31/seaturtle27/?action=view¤t=IMG_4236.jpg

Katie2009-02-08T11:31:17Z

Favorite Answer

I don't know about fish TB, but you can google it.
How old are the fish?
When they start to age, they get a form of arthritis and it's simply called bent spine. It won't kill the fish, and there's nothing you can do for it (if that's what it is), but that's a sign that it's old and will probably pass soon, but they can live out the rest of their lives with it. It could also be caused by genetics, if the fish isn't that old.

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