How to Care for Danios
  • 1. What is the minimum tank size recommended for a small school of Danios?
A) 20 gallons
B) 2.5 gallons
C) 5 gallons
D) 10 gallons
  • 2. Danios are generally considered what type of fish?
A) Brackish fish
B) Community fish
C) Aggressive fish
D) Solitary fish
  • 3. What is the ideal temperature range for Danios?
A) 78-82°F (26-28°C)
B) 80-85°F (27-29°C)
C) 68-78°F (20-26°C)
D) 60-65°F (15-18°C)
  • 4. What type of water hardness do Danios prefer?
A) Very hard
B) Brackish
C) Extremely soft
D) Soft to moderately hard
  • 5. What is the ideal pH range for Danios?
A) 7.6-8.0
B) 6.5-7.5
C) 8.0-9.0
D) 5.0-6.0
  • 6. Danios are known for being what type of swimmers?
A) Active swimmers
B) Stationary swimmers
C) Slow swimmers
D) Bottom dwellers
  • 7. How often should you perform water changes in a Danio tank?
A) Weekly
B) Monthly
C) Only when the water is dirty
D) Every other week
  • 8. What percentage of water should you change during a water change?
A) 25-50%
B) 75-100%
C) 10-20%
D) 5%
  • 9. What type of filtration is important for Danios?
A) Good biological filtration
B) Only chemical filtration
C) Only mechanical filtration
D) No filtration needed
  • 10. What type of food do Danios primarily eat?
A) Piscivore
B) Carnivore
C) Omnivore
D) Herbivore
  • 11. What is a common sign of stress in Danios?
A) Loss of color
B) Brightened colors
C) Increased activity
D) Increased appetite
  • 12. How many Danios should you keep in a group?
A) 1-2
B) Just one
C) 3-4
D) At least 6
  • 13. What is a common disease that affects Danios?
A) Ich
B) Fin rot
C) Dropsy
D) Swim bladder disease
  • 14. What is the best way to treat Ich in Danios?
A) Do nothing, it will go away on its own
B) Lower the temperature
C) Add salt only
D) Raise the temperature and use medication
  • 15. What type of plants are suitable for a Danio tank?
A) Delicate, slow-growing plants
B) Brackish water plants
C) Hardy, fast-growing plants
D) Plants that require high lighting
  • 16. Which of these tankmates is NOT a good choice for Danios?
A) Corydoras Catfish
B) Aggressive Cichlids
C) Guppies
D) Tetras
  • 17. What is the approximate lifespan of a Danio in captivity?
A) 1-2 years
B) 6-8 years
C) 3-5 years
D) 10+ years
  • 18. What is a good way to encourage breeding in Danios?
A) Add salt to the water
B) Raise the water level significantly
C) Lower the water level and add spawning mops
D) Separate the males and females permanently
  • 19. Danio eggs are...
A) Carried by the female
B) Laid in nests
C) Laid in a single, large clump
D) Scattered and adhesive
  • 20. What should you feed Danio fry?
A) Flake food
B) Brine shrimp (adult)
C) Infusoria or liquid fry food
D) Bloodworms
  • 21. What is the function of a sponge filter in a Danio tank?
A) To heat the water
B) Only chemical filtration
C) Only mechanical filtration
D) Biological and mechanical filtration
  • 22. Why is it important to cycle a new aquarium before adding Danios?
A) To establish beneficial bacteria
B) To make the water look clearer
C) To dechlorinate the water
D) To lower the pH
  • 23. What does the nitrogen cycle do?
A) Converts oxygen to carbon dioxide
B) Converts ammonia to nitrite to nitrate
C) Converts nitrate to nitrite to ammonia
D) Converts chlorine to chloramine
  • 24. What is the maximum size Danios typically grow to?
A) 4 inches
B) 2-2.5 inches
C) 6 inches
D) 1 inch
  • 25. Which of the following is a sign of overfeeding Danios?
A) Uneaten food on the bottom of the tank
B) Brightened coloration
C) Increased activity
D) Rapid growth
  • 26. What is the purpose of a quarantine tank?
A) To observe new fish for disease
B) To house aggressive fish
C) To grow plants
D) To breed fish
  • 27. What type of lighting is best for Danios?
A) Very bright lighting
B) Moderate lighting
C) UVB lighting
D) No lighting
  • 28. How often should you clean the substrate in a Danio tank?
A) Only when it looks dirty
B) Daily
C) During water changes
D) Never
  • 29. What does 'acclimating' a fish mean?
A) Giving the fish medication
B) Gradually adjusting the fish to the new tank's water parameters
C) Feeding the fish extra food
D) Changing the water in the bag the fish came in
  • 30. Why are Danios often recommended for beginner fishkeepers?
A) They are hardy and adaptable
B) They are very aggressive
C) They are very expensive
D) They require very little care
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