Zebra Danio Care Sheet

Zebra Danio Care
Zebra Danio Care, photo by Bob Jenkins


  • Scientific Name: Danio Rerio
  • Lifespan: Approximately 4 years
  • Size: 2 – 3 Inches
  • Care: Easy
  • Community: Yes, they do best in schools of 6 – 8
  • Lifestyle: Diurnal, active during the day.

Tank Requirements

  • Minimum Tank Size: 20 gallon long tank
  • Water Temperature Range: 64 – 74 °F
  • Water pH Range: 6.5 – 8.0
  • Water Hardness Range: 5 – 25 dH

Perform a 10%-25% water change weekly. If you do not have a filter in your tank, do a water change twice a week.


Many people will say a 10 gallon tank will do just fine, but if you have ever owned a zebra danio before, you should know they need all the room possible. These fish will probably be the most active fish specie in your fish tank. Having a 20 gallon long tank will allow your zebra danios to thrive happily. But if your budget can afford bigger aquarium, your zebra danios will greatly appreciate it and use all the room you give them.

Lighting & Hood

A hood is recommended as it aids in helping your fish stay in the tank. The hood also helps keep debris and dust from falling into the tank.


For Lighting: Full spectrum lighting – T5 is recommended.


In a small aquarium like a 20 gallon long tank, a hang on back filter will do just fine. Read more about hang on back filters.

Tank Setup

Zebra danios will usually stay around the middle to top level of the aquarium, only going towards the bottom for food. They will enjoy swimming through a few plants, but you should provide enough space to swim around comfortably in.


You may add live or fake plants in the aquarium to add a natural feel for the environment. If you choose to use fake plants, go with silk plants rather than plastic plants. Some plastic plants will scrape the skin of your fish as they swim by them. If you choose to use live plants, you may be needing to add a little bit more care towards your aquarium in terms of filtration, lighting, and water treatment. Live plants help decrease algae growth and help provide a feeling of security for your danios and other fish.


You may add the usual sunken pirate ship or broken skull to your aquarium but your zebra danios will most likely not use them. Ornaments are great for other fish who like to hide and need hiding places. Most crayfish will claim these area as theirs, so if you have any cray fish, this may add as a great home for them.

Feeding & Diet

They will take flake foods, freeze dried (blood worms, daphnia, brine shrimp, etc) and live foods. Since you will be housing your danios in schools of 6 – 8, you should make sure the food is available for all of them and the other fish in the tank.


Fine gravel or large river rocks will do just fine in a zebra danio tank. If you house other fish that prefer sand, sand will do fine as well. Try to avoid using large type gravel substrate, as this may cause impaction if ingested. During mating seasion, zebra danios will lay up to 400 eggs in a single spawning. If you want the eggs to hatch, remove the parent fish or they will eat the eggs.


Note: The information on this zebra danio care sheet is not a substitute for veterinary care.

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