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Is water conditioner necessary for my betta's tap water changes?

Updated On September 23rd, 2025

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

Everytime i change my bettas water (full water changes once a week) i fill it with tap and make sure its about the same temperature as the water he is swimming in then i just put him back in his bowl. I have never used water conditioner. Should i?

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on October 9th, 2017

Yes, tap water may contain chlorine or chloramine. Either can be toxic. Chlorine will dissipate if water is left out for 24-48 hours. This is called aging. Chloramines (used by many municipal water systems) will not dissipate and must be removed chemically with a water conditioner. StressCoat by API or NovAqua Plus by Kordon are both adequate conditioners. Look in the aquarium section of the local Petco or fish store for them.

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