Why do fish swim upside down?
If your fish swims upside down it most likely has a swimbladder disorder/disease. This happens when the swim bladder, a gas filled organ that controls the fish’s bouyancy by inflating or deflating, is unable to control itself and causes the fish to either stay at the bottom of the tank, float helplessly at the top, bob-around head first at the bottom, swim on its side, or swim upsidedown. A swimbladder problem can be caused by consipation, bacterial infection, poor water quality, physical damage to the swim bladder, or physical deformity of the swim bladder. This condition is sometimes hard to treat because its often hard to diagnose the cause before its to late. The first step to take with a fish that has a swim bladder disorder is to test the water quality of your tank. It is usually a good idea to move the affected fish into a 5-10 gallon hospital tank for observation/treatment to ensure that the other fish do not become sick also. A good first act of treatment for an unknown cause
