How to Care for Discus Fishes
  • 1. What is the ideal water temperature for Discus?
A) 68-72°F (20-22°C)
B) 88-92°F (31-33°C)
C) 82-86°F (28-30°C)
D) 72-76°F (22-24°C)
  • 2. What is the recommended pH level for Discus?
A) 5.0-6.0
B) 8.0-9.0
C) 6.0-7.0
D) 7.5-8.5
  • 3. How often should you perform water changes for Discus?
A) Once a week
B) 2-3 times per week
C) Once a month
D) Every other day
  • 4. What percentage of water should be changed during water changes?
A) 10-20%
B) 75-90%
C) 100%
D) 25-50%
  • 5. What type of filtration is best for Discus?
A) Sponge filter, canister filter
B) Undergravel filter
C) Hang-on-back filter only
D) No filtration
  • 6. What is a common food for Discus?
A) Bread
B) Lettuce
C) Goldfish flakes
D) Beefheart mix
  • 7. What is a sign of stress in Discus?
A) Aggressive behavior
B) Constant eating
C) Darkened coloration
D) Bright coloration
  • 8. What is a common disease affecting Discus?
A) Dropsy
B) Hexamita (Hole-in-the-head)
C) Ich (White Spot Disease)
D) Fin Rot
  • 9. What is the minimum tank size for a group of Discus?
A) 10 gallons
B) 75 gallons
C) 40 gallons
D) 20 gallons
  • 10. How many Discus should be kept together?
A) 1
B) At least 5-6
C) 2
D) 3
  • 11. What type of lighting is best for Discus?
A) Dim or subdued lighting
B) Bright, intense lighting
C) Black lights
D) No lighting
  • 12. What type of substrate is recommended?
A) Sharp rocks
B) Large gravel
C) Crushed coral
D) Fine sand or bare bottom
  • 13. What should you do before adding new Discus to an established tank?
A) Immediately add them
B) Float the bag for 5 minutes
C) Quarantine them
D) Mix the water quickly
  • 14. What is the benefit of adding driftwood to a Discus tank?
A) Releases tannins, lowering pH
B) Makes the water harder
C) Provides food
D) Raises pH
  • 15. What is the ideal TDS (Total Dissolved Solids) level for Discus?
A) Above 1000 ppm
B) 50-200 ppm
C) 500-1000 ppm
D) 0 ppm
  • 16. What is the optimal age to start breeding Discus?
A) 6 months
B) 3 years
C) 12-18 months
D) 2 years
  • 17. How long does it take for Discus eggs to hatch?
A) 1 week
B) 24 hours
C) Approximately 60 hours
D) 1 month
  • 18. What do Discus fry feed on initially?
A) Baby brine shrimp
B) Bloodworms
C) Flake food
D) Parent's slime coat
  • 19. Why is good water quality crucial for Discus?
A) Prevents disease and stress
B) Has no effect on their health
C) Increases their lifespan exponentially
D) Makes them grow faster
  • 20. Which of these fish are NOT good tankmates for Discus?
A) Pencilfish
B) Cardinal tetras
C) Aggressive cichlids
D) Corydoras
  • 21. What is the scientific name of the Discus fish?
A) Poecilia reticulata
B) Betta splendens
C) Symphysodon spp.
D) Carassius auratus
  • 22. What does 'Hexamita' cause in Discus?
A) Hole in the Head disease
B) Ich
C) Dropsy
D) Fin Rot
  • 23. Why is a cycled tank important for Discus?
A) Increases oxygen levels
B) Makes the water clearer
C) Removes harmful ammonia and nitrites
D) Adds beneficial chemicals
  • 24. What can high nitrate levels cause in Discus?
A) Stress and susceptibility to disease
B) Faster growth
C) Brighter colors
D) Increased appetite
  • 25. Which food is NOT suitable for adult Discus?
A) Bloodworms
B) Vegetable flakes only
C) Beefheart
D) Granules
  • 26. How can you acclimatize new Discus to your tank?
A) Drip acclimation
B) Float the bag for 1 hour
C) Pour them in directly
D) Mix half the bag water with the tank water and release
  • 27. What is a sign of good health in Discus?
A) Clamped fins
B) Rapid breathing
C) Lethargy and hiding
D) Active swimming and eating
  • 28. What is the role of tannins in a Discus tank?
A) Increase pH
B) Add oxygen
C) Remove nitrates
D) Lower pH and create a natural environment
  • 29. What should you do if your Discus develops hole-in-the-head disease?
A) Add salt to the tank
B) Increase water temperature
C) Ignore it, it will heal on its own
D) Treat with metronidazole
  • 30. What is the purpose of a quarantine tank?
A) To store extra equipment
B) To grow plants
C) To observe new fish for disease
D) To breed fish
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