Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

Why is my fish lying at the bottom? Is it sick or water quality?

Updated On September 23rd, 2025

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

My fish is laying down at the bottom of the tank.

2 Answers

Most Helpful Answer

Image profile

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

Veterinarian

Published on March 9th, 2018

If persistent this is a very concerning but generic sign, which requires a logic but quite 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. Hope this answer was helpful, but 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.

Vote icon

2Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Angel Alvarado, LVT

    Licensed Veterinary Technician

    Published on March 9th, 2019

    Check the water chemistry first. Use 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 (0 ppm) 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. Bettas are tropical fish and do best between 78 F and 80 F. Once he has clean, warm water, he may perk up. Maintain pristine water quality to promote overall health.

    Vote icon

    1Pet Parents found this answer helpful

See More Answers

Related Questions

Petco Pet Education Center
Health & Wellbeing
What to do if my cat has a small hole with pus coming from its ear?
Is your cat's ear hole oozing pus? A Petco vet explains potential infections like abscesses from bites, advising immediate vet care, antibiotics, and recovery.
Updated on September 23, 2025
Petco Pet Education Center
Health & Wellbeing
My hamster has a lump and dry skin. Does he need a vet?
Is your active hamster showing a lump or dry skin? A certified veterinarian explains why immediate assessment is crucial for diagnosis and a treatment plan.
Updated on September 23, 2025
Petco Pet Education Center
Health & Wellbeing
What fish dog food helps dry skin if my dog eats Science Diet?
Is your dog's dry skin a concern? A certified vet offers expert advice on finding the best fish-based dog food alternatives to Science Diet for essential oils.
Updated on February 04, 2026
Petco Pet Education Center
What should I feed my red-eared slider? So much conflicting info!
A veterinarian offers expert advice on feeding your red-eared slider. Learn the ideal diet, including vegetables, pellets, and live fish, to help your turtle thrive.
Updated on September 23, 2025
Petco Pet Education Center
New Pet
My green cheek conure's voice is raspy and sneezy. Should I worry?
Is your green cheek conure's voice raspy or sneezy? A certified vet explains common causes like respiratory infections and advises on your bird's health.
Updated on September 23, 2025
Petco Pet Education Center
Is neutering my male rabbit necessary if vets aren't rabbit experts?
Is neutering your male rabbit mandatory? A trusted Petco veterinarian provides expert guidance on whether to risk neutering your bunny without a reliable vet.
Updated on September 23, 2025
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Book Now

Sponsored