My goldfish is swimming upside down. What's the problem and solution?

Question

My 2 year old goldfish keeps swimming upside down and I can't figure out why. Pet's info: Fish | Gold Fish | Male

Angel Alvarado, LVT · Accepted Answer

It is likely due to swim bladder disease. This can be caused by infection, parasites or constipation. Check water chemistry first. This can be done using a home test kit or by submitting a water sample for testing. The local Petco may do this for free or for a small fee. Aim for an absence (0 ppm) of ammonia and nitrites with nitrates at 20 ppm or less. Perform partial water changes to stabilize chemistry and/or to improve water quality. Use only conditioned water that is temperature matched to prevent stress or shock. Goldfish are cold water fish and do best between 68 F and 72 F. Next, fast Mylo for 3 days. Resume feeding bits of cooked and shelled green peas. This will help with constipation. You may also need a broad spectrum antibiotic or a broad spectrum anti-parasitic. You can find either in the aquarium section of the local Petco. Follow label directions carefully and remove the carbon filter insert during treatment if indicated.

My goldfish is swimming upside down. What's the problem and solution?

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