Koi care collection

Koi Fish Diseases

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

Are Uv Lights Good For Fish Tanks?
Koi FishJun 25, 2022

Are Uv Lights Good For Fish Tanks?

The purpose of this essay is to explore the benefits and drawbacks of using UV lights in fish tanks. UV light is known to kill bacteria and parasites, and can be an effective way to keep a fish tank clean. For more pond-care guidance, read What Does Parasitic Infection Look…

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Can Fish See Our Air?
Koi FishJun 25, 2022

Can Fish See Our Air?

The answer to this question may surprise you – fish can actually see our air! Though they live underwater, fish have special adaptations that allow them to see the air above the surface of the water. This ability helps them to avoid predators, find food, and navigate their…

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Why Are You Not Supposed To Tap On A Fish Tank?
Koi FishJun 25, 2022

Why Are You Not Supposed To Tap On A Fish Tank?

A fish tank is a glass or plastic container in which fish and other aquatic animals are kept. Fish tanks are often decorated with rocks, plants, and other objects. For more pond-care guidance, read Are Koi Top Or Bottom Feeders? and review MSD Veterinary Manual: Fish diseases.

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Can I Medicate The Whole Fish Tank?
Koi FishJun 25, 2022

Can I Medicate The Whole Fish Tank?

Aquariums are a popular pet choice for many people, as they can be relatively low-maintenance and provide a calming presence in the home. However, when it comes to the health of the fish in an aquarium, there are a few things to consider before medicating the entire tank. For…

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Are Bacterial Infections In Fish Contagious?
Koi FishJun 25, 2022

Are Bacterial Infections In Fish Contagious?

Bacterial infections are one of the most common diseases in fish. They can be caused by a variety of different bacteria, and can affect different parts of the fish's body. For more pond-care guidance, read Do Koi Fish Eat Leaves? and review MSD Veterinary Manual: Fish diseases.

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Can Fish Heal From Wounds?
Koi FishJun 25, 2022

Can Fish Heal From Wounds?

Fish are able to heal from wounds, though the process can vary depending on the type of fish. Smaller fish tend to heal more quickly than larger fish, and some fish are able to regenerate lost body parts. For more pond-care guidance, read Is Baking Soda Safe For Koi? and review…

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Why Does My Fish Have Blisters?
Koi FishJun 25, 2022

Why Does My Fish Have Blisters or Raised Bumps?

Fish blisters are a common condition that can be caused by a variety of factors, including infection, injury, or parasites. In most cases, fish blisters are not serious and will resolve on their own. For more pond-care guidance, read What Age Do Koi Change Colour? and review…

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Can You Use Iodine To Treat Fish?
Koi FishJun 25, 2022

Can You Use Iodine To Treat Fish?

Iodine is a chemical element with the symbol I and atomic number 53. It is a halogen. Iodine occurs naturally in the environment, but it can also be produced synthetically. For more pond-care guidance, read Can Fin Rot Heal Itself? and review MSD Veterinary Manual: Fish diseases.

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Is Iodine Poisonous To Fish?
Koi FishJun 25, 2022

Is Iodine Poisonous To Fish?

Iodine is a chemical element with the symbol I and atomic number 53. It is a halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly colored gas. Iodine is the heaviest of the stable halogens, being the heaviest non-radioactive…

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What Temperature Is Too Hot For Koi?
Koi FishJun 25, 2022

What Temperature Is Too Hot For Koi?

Koi are a species of fish that are native to East Asia. They are a popular choice for ornamental ponds and water gardens due to their brightly colored scales and calm demeanor. For more pond-care guidance, read What Do Bubbles In A Pond Mean? and review MSD Veterinary Manual:…

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Do Koi Jump For Fun?
Koi FishJun 25, 2022

Do Koi Jump For Fun?

Koi are a species of freshwater fish that are popular in both Japan and China. They are often kept in ponds and aquariums, and are known for their bright colors and patterns. For more pond-care guidance, read Do Koi Like Clear Water? and review MSD Veterinary Manual: Fish…

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