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Why are my new betta fish dying so fast after bringing them home?

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male | 1 month old | 123 lbs

i brought some new betta fish this morning but a lot of fish die at noon

2 Answers

Most Helpful Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on October 18th, 2017

As long as you are properly setting up the environment for your new fish, not stressing him out too much, and making sure he is happy and healthy, he shouldn't pass away at a certain time of day. A google search can give you a myriad of information about how to care for your betta, however most do best in an actual tank with a proper filter and heater to keep things warm and fresh, a lid to keep active bettas from jumping out and becoming injured, and for males, no other bettas or aggressive fish in the tank. If you're unsure if your tank environment is safe, most pet stores will test water samples for free and point you in the direction of any changes you need to make.

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Other Answers

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    Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

    Veterinarian

    Published on

    In these cases you need a logic but radical approach. Begin by submitting a water sample for quality testing. Most pet stores will do this for free or a nominal fee. High ammonia levels, PH imbalances may be responsible for that. Oxygen concentration and quality of the filters should be determined as well. If water quality is good and there are no major imbalances, your fish should get examined to look for any sign of bacterial/fungal infection and eventually water should be treated. Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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