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