Systemic Mild to Moderate Fish

Swim Bladder Disease

Also known as: Swim Bladder Disorder, Buoyancy Disorder, Floating Disease

Swim bladder disease encompasses conditions affecting the swim bladder's ability to regulate buoyancy. Affected fish cannot maintain normal position in the water column, floating at the surface, sinking to the bottom, or swimming at abnormal angles. It is particularly common in fancy goldfish and bettas due to their compressed body shapes.

Symptoms & Signs

Causes & Risk Factors

Overfeeding and constipation (compresses swim bladder), rapid eating with air swallowing, bacterial infection of the swim bladder, physical deformity (genetic in fancy breeds), temperature shock, poor water quality, and internal parasites.

Diagnosis

Observation of abnormal buoyancy and swimming behavior. Radiographs can reveal swim bladder inflammation, displacement, or structural abnormalities. Assessment of diet and feeding practices. Water quality testing.

Treatment

Fast for 24-48 hours, then feed blanched peas (fiber helps constipation). Raise water temperature slightly (78-80°F). Epsom salt bath. Antibiotics if bacterial infection suspected. Lower water level to reduce swimming effort. Hand-feeding for chronic cases.

Prevention

Feed appropriate portions (no overfeeding). Soak dry foods before feeding. Provide varied diet with fiber. Maintain stable water temperature. Avoid temperature fluctuations. Select fish with less extreme body shapes.

Prognosis

Good for diet-related cases (often resolves within days). Chronic or congenital cases in fancy breeds may require ongoing management. Bacterial infections have variable outcomes depending on severity.

Affected Breeds (12)

BreedSpeciesSize
Betta FishFishSmall
Common GoldfishFishLarge
Flowerhorn CichlidFishLarge
Harlequin RasboraFishNano
Oranda GoldfishFishLarge
Pearl GouramiFishMedium
Ram CichlidFishSmall
Ranchu GoldfishFishMedium
Ryukin GoldfishFishMedium
Shubunkin GoldfishFishLarge
Telescope Eye GoldfishFishMedium
Tiger BarbFishSmall

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