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How to Raise Danios
Contributed by: Boyd
  • 1. What is the recommended minimum tank size for a school of Danios?
A) 10 gallons
B) 20 gallons
C) 2.5 gallons
D) 5 gallons
  • 2. Danios are known for being which type of fish?
A) Bottom dwellers
B) Predatory
C) Territorial
D) Active swimmers
  • 3. What is the ideal water temperature range for Danios?
A) 68-78°F (20-26°C)
B) 80-85°F (27-29°C)
C) 60-65°F (15-18°C)
D) 85-90°F (29-32°C)
  • 4. What type of food is best for Danios?
A) Carnivore pellets
B) Live plants
C) Algae wafers
D) Omnivore flakes or pellets
  • 5. How many Danios should you keep in a school at a minimum?
A) 6
B) 2
C) 4
D) 10
  • 6. What is the average lifespan of a Danio?
A) 10 years
B) 6 months
C) 3-5 years
D) 1 year
  • 7. What is the ideal pH level for a Danio tank?
A) 9.0-10.0
B) 6.5-7.5
C) 5.0-6.0
D) 8.0-9.0
  • 8. What is the most common cause of death in Danios?
A) Aggression from other fish
B) Overfeeding
C) Old age
D) Poor water quality
  • 9. Are Danios egg-layers or livebearers?
A) Egg-layers
B) Livebearers
C) Mouthbrooders
D) Egg-scatterers
  • 10. What is the scientific name of the Zebra Danio?
A) Carassius auratus
B) Poecilia reticulata
C) Betta splendens
D) Danio rerio
  • 11. Danios are generally considered to be...
A) Territorial fish
B) Fin-nipping fish
C) Peaceful fish
D) Aggressive fish
  • 12. What type of filtration is recommended for a Danio tank?
A) Only an air stone
B) A filter twice the size of the tank
C) No filtration needed
D) A filter suitable for the tank size
  • 13. How often should you perform water changes in a Danio tank?
A) 25% weekly
B) Never
C) 50% daily
D) 10% monthly
  • 14. What is a common symptom of Ich in Danios?
A) Bloated abdomen
B) White spots on the body
C) Frayed fins
D) Cloudy eyes
  • 15. What type of decorations do Danios enjoy?
A) Empty tank
B) Large aggressive tankmates
C) Sharp rocks and coral
D) Plants and smooth rocks
  • 16. What should you do before adding new Danios to an established tank?
A) Float the bag for 5 minutes
B) Mix the water from both tanks
C) Quarantine them
D) Add them immediately
  • 17. What are Danios sensitive to in aquarium water?
A) Oxygen and Carbon Dioxide
B) Chlorine and Chloramine
C) Calcium and Magnesium
D) Ammonia and Nitrites
  • 18. What kind of lighting is best for Danios?
A) No lighting
B) UV lighting
C) Very bright lighting
D) Moderate lighting
  • 19. What is the best way to feed Danios?
A) Feed only once a week
B) Leave food in the tank constantly
C) One large feeding a day
D) Small portions twice a day
  • 20. Danios are native to which continent?
A) South America
B) North America
C) Africa
D) Asia
  • 21. Which of these is NOT a common type of Danio?
A) Rainbow Danio
B) Leopard Danio
C) Giant Danio
D) Zebra Danio
  • 22. What does 'dimorphism' refer to in Danios?
A) The ability to breathe air
B) The ability to change color
C) Visual differences between males and females
D) Their schooling behavior
  • 23. How can you tell the difference between male and female Danios?
A) Females have brighter colors
B) Males are always larger
C) Males have longer fins
D) Females are usually rounder
  • 24. What is the primary function of aquarium salt for Danios?
A) Helps with osmoregulation and parasite control
B) Lowers the pH of the water
C) Removes chlorine from the water
D) Provides essential nutrients
  • 25. What is the meaning of the 'cycle' process in aquarium keeping?
A) Adjusting the pH
B) Changing the water
C) Adding decorations
D) Establishing beneficial bacteria
  • 26. Which plant is generally NOT recommended for a Danio tank due to its high light demands?
A) Java Moss
B) Anubias
C) Alternanthera Reineckii
D) Java Fern
  • 27. What should you do if you notice bullying behavior among your Danios?
A) Ignore the behavior; it will resolve itself
B) Remove the bullied fish
C) Increase school size and add more hiding places
D) Isolate the bully
  • 28. What is a common substrate used in aquariums for Danios?
A) Sand
B) Concrete
C) Soil
D) Gravel
  • 29. What does 'nitrate' accumulation signify in a Danio tank?
A) Ideal water parameters
B) The end product of the nitrogen cycle
C) A dangerous level of ammonia
D) A lack of oxygen
  • 30. Why is it important to avoid overfeeding Danios?
A) They will grow too large
B) They will lose their color
C) They will become aggressive
D) It can lead to poor water quality and health issues
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