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How to clean a fish tank after a fish dies before adding new fish?

Updated On September 23rd, 2025

Pet's info: Fish | Betta | Male | unneutered | 9 months and 28 days old | 0.2 lbs

Hey! My fish Norman has recently passed away, his skin and scales deceased and you could see his ribs from the looks of it I’m not sure what he was infected with, but how should I treat the fish tank if I plan on putting more fish in it?

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on August 9th, 2019

Thanks for using Petco Pet Education Center, formerly Petcoach! I am so sorry to hear about the passing of Norman. If the Betta tank is currently empty, I would suggest changing the gravel and cleaning it very well before putting another fish in it. Make sure to change the water regularly as this is often the cause of issues with Betta fish. Best of luck!

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