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Why is my betta fish not eating and turning white? Is he sick?

Updated On September 23rd, 2025

Pet's info: Fish | Betta | Male

My betta fish hasn't been eating and today went from purple to white

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1 Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on October 30th, 2019

Check water temperature. Low temps can affect activity and appetite in fish. Bettas do best between 78 F and 80 F. Next, check water chemistry. This can be done using a home test kit or submit a water sample for testing. The local Petco may do this for free or for a small fee. Aim for an absence (0ppm) of ammonia and nitrites with nitrates at 20ppm 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.

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