swimming problem

[Cassie Shepherd]

[COLOR=p purple]

One of my fish has problems swimming, a few weeks ago he was swimming down all the time. I changed my water and now again he is swimming down again.
Has this fish got some thing as all the others are fine?

Please help!!!

 

[Kossy]

It could be swim-bladder disease, follow my sig on diseases. SHould give you some background. Not really any cures (100% effective) however they usually get over it themselves...or they