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You are here: myPetSmart.com > Pet Care Library > Articles > Danio

Danio

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Traits & behavior

Carnivores
Instead of plants, these fish eat aquatic crustaceans, worms and aquatic insect larvae.

Middle swimmers
You will see your danios swimming in the middle of your aquarium. To create a beautiful aquarium environment, be sure to add some top and bottom swimmers as well. Ask a PetSmart associate to help you choose.

Schoolers
That means they like to swim in groups and should be kept with three or more other fish of the same species.
 

Things to remember

Adding fish
Whether you're just starting your aquarium or introducing new fish into your tank, don't forget to add only 1-3 at a time.

Safety & cleanliness
Please remember that all pets may bite or scratch, and may transmit disease to humans. Keep your pet's home clean and wash your hands before and after handling your pet or cleaning his home. Infants, young children, pregnant women, people with compromised immune systems, and the infirm or elderly are at greater risk of infections and should use caution when in contact with the pet or its habitat. Consult your doctor for more information.
 

Nutrition

Staple diet
Choose a tropical flake or pellet fish food. Feed according to the directions on the packaging.

Specialty foods
Vary their diet by including frozen or freeze-dried bloodworms, tubifex worms and other small worms, mosquito larvae and daphnia. Always remember to thaw frozen foods before feeding.

Frequent feedings
For optimum health, feed your danios as much food as they will consume in 1-3 minutes, twice a day. You can alternate between regular staple diet feedings and 2-4 meals per week of a specialty food.

Health

Signs your danios are healthy:

  • Eating vigorously and actively swimming together in the middle of the aquarium
  • Clear eyes, smooth, clean skin and fins free from any lesions or inconsistent colorations
  • Calm, steady gill movements

Things to watch for:

  • Lying on bottom of aquarium
  • Poor growth or weight loss
  • Inflamed gills, skin or fins
  • Fins clamped to sides
  • Scraping body on rocks
  • Swimming apart from the school

If you notice any of the signs described above, check your aquarium water quality and consult a PetSmart Aquatics Specialist.
 

Environment

Aquarium
Danios need a long or large aquarium where they can swim as a school. A good rule of thumb is one gallon of water for every one inch of full-grown fish.

Décor
Decorate their aquarium with lots of plants, but be sure to place them on the sides and back of the tank so they'll have enough space to swim in the center. Also provide hiding places in the form of rocks, roots and bogwood.

Fish compatibility
Danios can share their aquarium with other community aquarium fish of similar size and temperament.

Water changes
Test water weekly to assess water quality. It is recommended that 10% of your aquarium water be changed per week. At the very least, 25% of your aquarium water should be changed per month.

Water temperature
Danios require a tropical community aquarium with water temperatures ranging between 72-78° F. Use an aquarium heater to maintain water temperature.

Aquarium placement
Place your aquarium in a low-traffic area, away from direct sunlight and drafts.

Aquarium stand
An aquarium stand will safely support the weight of your filled aquarium.

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