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Why does my Betta fish tank keep getting algae so quickly?

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male | unneutered

Hello, I have a Beta fish. His tank keeps getting algae. I just cleaned it and purchased new rocks and now its back. Just wondering if I should get a new tank, or bleach his current tank. -Thanks

1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on October 12th, 2017

Algae is a constant in an aquarium. The smaller the tank the harder to keep it clean. Bleach will kill any fish you put in the tank after using it, and it will just come back anyway. Frequent partial water changes will help, but manually wiping the tank is the only way to keep it clean. An algae eater can help but usually not a good idea with a beta fish.

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