Koi Swimming Sideways: Swim Bladder Disorder and Quarantine Treatment

Koi Swimming Sideways: Swim Bladder Disorder and Quarantine Treatment

A new pond's white butterfly koi disappeared for a week, then found swimming erratically on its side, head up. Water parameters (pH, temp, ammonia) are normal. Melafix has been added. UV filter and waterfall running.

Diagnosis: Swim Bladder Issue

Side swimming, listing, or inability to maintain buoyancy indicates swim bladder dysfunction. Causes: bacterial infection, physical injury, constipation, or congenital defect.

Treatment Protocol

1. Quarantine in a separate tank with clean, aerated water.
2. Gradually raise temperature to 70°F (21°C) to boost immune function.
3. Add cooking salt (non-iodized, no anti-caking agents) at 1-3 g/L (0.1-0.3%) to reduce osmotic stress and deter parasites.
4. Fast for 2-3 days then feed peeled, cooked peas (helps with constipation).
5. Antibiotics (e.g., kanamycin, erythromycin) if bacterial infection suspected.

Do not use table salt (contains additives). Monitor closely; recovery is possible if caught early.