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Why is my goldfish at the bottom of the tank and not eating?

Updated On September 23rd, 2025

Pet's info: Fish | Gold Fish

My pond goldfish had swim bladder issues so has been inside for 6 weeks. He was pretty active and I brought in another to keep him company. Since Feb 1st, he is at the bottom, eating a bit especially when I drop it right in from of him. No external signs of any disease that I can seen. Nitrites are high as tank is cycling. I am adding Prime, aquarium salt (1 gram) and 30% water changes. Nitrite converting bacteria is establishing now. Any thought on what it could be and what to do? Thank you

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1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on February 6th, 2020

Potential causes include overfeeding, low water temps, constipation, parasites or other infection. Confirm proper water chemistry, again if necessary and continue with the treatments described. Fast the the for 3 days then feed bits of cooked and shelled green peas. This will help with constipation. Make sure the water temperature is not too chilly. Low temps may affect digestion in fish. A medicated food can be fed to clear any parasites or infection. Look in the aquarium section of the local pet store for these medications. If you do not use medicated food and instead treat the tank, be sure to remove the carbon filter insert during treatment.

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