Koi care collection

Koi Fish Diseases

A growing library of clear, useful guides about koi fish diseases.

Why Is My Fish Poop Black?
Koi FishJun 27, 2022

Why Is My Fish Poop Black?

Fish poop black because of the food they eat. The food they eat contains a lot of pigment which is then excreted in their poop. For more pond-care guidance, read Can You Mix Melafix With Pimafix? and review MSD Veterinary Manual: Fish diseases.

Read guide
What Is The Best Treatment For Fish?
Koi FishJun 27, 2022

What Is The Best Treatment For Fish?

Fish are a popular pet choice for many reasons, including their wide variety of colors, sizes, and personalities. But what happens when your fish gets sick? How do you know what the best treatment is? For more pond-care guidance, read Can You Fish With Worms At Night? and…

Read guide
How Do You Treat A Fish With A Bloated Stomach?
Koi FishJun 27, 2022

How Do You Treat A Fish With A Bloated Stomach?

A fish with a bloated stomach is a common problem for fishkeepers. There are a few different causes of a bloated stomach in fish, and the most common is overfeeding. For more pond-care guidance, read Why Does My Fish Have Poop Hanging From It? and review MSD Veterinary Manual:…

Read guide
Why Does My Fish Look Pregnant?
Koi FishJun 27, 2022

Why Does My Fish Look Pregnant?

A fish may look pregnant for a number of reasons, including being bloated from overeating, being full of eggs, or suffering from a condition known as dropsy. In most cases, a pregnant-looking fish is not actually pregnant and is not in any danger. For more pond-care guidance,…

Read guide
What Is Antibacterial Fish Food?
Koi FishJun 27, 2022

What Is Antibacterial Fish Food?

Antibacterial fish food is a type of fish food that contains ingredients that help to prevent or treat bacterial infections in fish. This type of fish food can be used to help prevent or treat a wide variety of bacterial infections, including those that cause diseases such as…

Read guide
How Much Salt Can I Put In My Freshwater Tank?
Koi FishJun 27, 2022

How Much Salt Can I Put In My Freshwater Tank?

Salt is a common household item that can be used to add flavor to food or to clean surfaces. It is also a key ingredient in many aquariums and fish tanks. For more pond-care guidance, read Is Algae Ok In A Koi Pond? and review MSD Veterinary Manual: Fish diseases.

Read guide
Can I Use Rock Salt Instead Of Epsom Salt?
Koi FishJun 27, 2022

Can I Use Rock Salt Instead Of Epsom Salt?

Epsom salt is a type of salt that has many uses, including in baths and as a fertilizer. Rock salt is another type of salt that can be used for similar purposes. For more pond-care guidance, read Can Koi Eat Rice? and review MSD Veterinary Manual: Fish diseases.

Read guide
Can You Mix Salt And Epsom Salt Together?
Koi FishJun 27, 2022

Can You Mix Salt And Epsom Salt Together?

Epsom salt is a type of salt that is often used for its therapeutic benefits. It is believed to help relieve muscle pain, reduce inflammation, and improve circulation. For more pond-care guidance, read What Should I Put In New Pond Water? and review MSD Veterinary Manual: Fish…

Read guide
Why Is My Koi Swimming Head Down?
Koi FishJun 27, 2022

Why Is My Koi Swimming Head Down?

Koi are a popular type of freshwater fish that are often kept in ponds or aquariums. They are a member of the carp family and are native to East Asia. For more pond-care guidance, read Do Koi Fish Need Salt Water? and review MSD Veterinary Manual: Fish diseases.

Read guide
How Long Do You Leave A Goldfish In Epsom Salt Bath?
Koi FishJun 27, 2022

How Long Do You Leave A Goldfish In Epsom Salt Bath?

Epsom salt is a type of salt that is often used in bath products. It is also a popular home remedy for a variety of ailments, including muscle aches and pains, and is sometimes used as a laxative. For more pond-care guidance, read Do Koi Prefer Shade? and review MSD Veterinary…

Read guide
Do Koi Like Warm Water?
Koi FishJun 27, 2022

Do Koi Like Warm Water?

Koi are a type of fish that are often kept in ponds and aquariums. They are a popular choice for many people because of their bright colors and patterns. For more pond-care guidance, read How Can I Improve The Quality Of My Pond Water? and review MSD Veterinary Manual: Fish…

Read guide
How Much Himalayan Salt Do I Add To Water?
Koi FishJun 27, 2022

How Much Himalayan Salt Should You Add to Water?

Himalayan salt is a type of rock salt that is found in the Himalayan Mountains. It is pink in color and has a high mineral content. For more pond-care guidance, read Should I Run My Pond Pump All The Time? and review MSD Veterinary Manual: Fish diseases.

Read guide