Petco Text Logo
Petco Pet Logo

Why is my goldfish dying? It has white fuzz and is on its side.

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male | 1lb

I NEED HELP!!! I fell in love with my goldfish and he's dying!!! He's had white snow on his body! He's breathing but he's on his side!! Not eating or swimming HELP!!!

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on September 16th, 2017

Check the water temperature and chemistry. Goldfish do best in water between 65 F and 72 F. They make more waste than other fish, so require much better filtration. Without a filter in a properly cycled tank (bowl is not appropriate), ammonia and nitrites can become dangerously elevated. The stress can lead to infection. White fuzz can be fungal infection. White dots, like grains of salt, may be ich. He needs clean water at the appropriate temperature and medication. You can purchase medication to treat fungus or ich in your local Petco. Look in the aquarium section. Follow label directions carefully. Plain aquarium salt (NOT table salt) can be used to aid healing. Dissolve 1 teaspoon per gallon of water into some tank water and treat for 7-10 days. Partial water changes will be necessary afterwards to decrease salinity.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored