How to Raise Koi Fishes - Exam
  • 1. What is the ideal pH range for a koi pond?
A) 6.0 - 6.5
B) 7.0 - 8.5
C) 9.0 - 9.5
D) 5.0 - 5.5
  • 2. What is the minimum pond depth recommended for koi?
A) 6 inches
B) 2 feet
C) 3 feet
D) 1 foot
  • 3. What type of filter is essential for a koi pond?
A) Mechanical filter
B) UV sterilizer
C) Chemical filter
D) Biological filter
  • 4. How often should you perform water changes in a koi pond?
A) 50% monthly
B) 100% yearly
C) 5% monthly
D) 10-20% weekly
  • 5. What is a common sign of overfeeding koi?
A) Healthy fish
B) Clear water
C) Cloudy water
D) Algae growth
  • 6. What is the ideal temperature range for koi?
A) 65-75°F
B) 40-50°F
C) 85-95°F
D) 30-40°F
  • 7. What is the quarantine period recommended for new koi?
A) 2 weeks
B) 1 week
C) 1 day
D) 4-6 weeks
  • 8. What is a common parasite that affects koi?
A) Water lilies
B) Algae
C) Ich
D) Snails
  • 9. What type of food is best for young koi?
A) Flake food
B) High-protein food
C) Low-protein food
D) Algae wafers
  • 10. Which of these is NOT a factor affecting koi pond water quality?
A) Pond location relative to moon phase
B) Decomposing organic matter
C) Fish waste
D) Sunlight
  • 11. What does KH measure in a koi pond?
A) Potassium Hydride
B) Keto Hydrate
C) Carbonate Hardness
D) Krypton Halide
  • 12. Why is aeration important in a koi pond?
A) Filters the water
B) Reduces algae growth
C) Keeps the water warm
D) Provides oxygen for the fish
  • 13. What can be added to a koi pond to help reduce ammonia?
A) Beneficial bacteria
B) Salt
C) Bleach
D) Vinegar
  • 14. What is the recommended number of koi per gallon of water?
A) 1 koi per 50 gallons
B) 1 koi per 250-500 gallons
C) 1 koi per 1000 gallons
D) 1 koi per 10 gallons
  • 15. Which of these plants is LEAST suitable for a koi pond?
A) Poison Ivy
B) Water hyacinth
C) Water lilies
D) Cattails
  • 16. What is the term for the Japanese art of breeding koi?
A) Nishikigoi
B) Sumo
C) Bonsai
D) Origami
  • 17. What does ammonia do to koi?
A) Repels parasites
B) Makes them more colorful
C) Burns their gills
D) Helps them grow faster
  • 18. What is the purpose of a pond skimmer?
A) Filters the water
B) Adds oxygen to the water
C) Removes surface debris
D) Heats the water
  • 19. What is a common symptom of a bacterial infection in koi?
A) Ulcers
B) Increased activity
C) Brighter colors
D) Increased appetite
  • 20. Which of the following is a good source of supplemental oxygen in a koi pond?
A) Rock salt
B) Pond dye
C) Aquatic plants
D) Air stone
  • 21. What is the primary cause of green water in a koi pond?
A) Bacterial infection
B) Parasites
C) Algae bloom
D) High ammonia levels
  • 22. What is the best way to prevent heron attacks on your koi?
A) Feeding the herons
B) Planting tall grasses
C) Netting over the pond
D) Adding more fish
  • 23. Why should you avoid using copper-based medications in a koi pond?
A) Toxic to koi
B) Reduces water clarity
C) Ineffective against parasites
D) Causes algae blooms
  • 24. What should you do with koi during the winter months in cold climates?
A) Keep a hole in the ice for gas exchange
B) Add antifreeze to the pond
C) Move them indoors to a heated tank
D) Stop feeding them completely
  • 25. What is the term for a koi with a metallic sheen?
A) Ogon
B) Sanke
C) Kohaku
D) Showa
  • 26. What is the most important factor in selecting a location for a koi pond?
A) Proximity to trees
B) Sunlight exposure
C) Visibility from the house
D) Soil type
  • 27. What is the purpose of a bottom drain in a koi pond?
A) Adds oxygen to the water
B) Circulates the water
C) Removes solid waste
D) Heats the water
  • 28. What is the best way to test the water quality of a koi pond?
A) Use a test kit
B) Taste the water
C) Smell the water
D) Observe the fish behavior
  • 29. What type of filter uses gravity to remove solids from pond water?
A) UV sterilizer
B) Biological filter
C) Settlement chamber
D) Chemical filter
Created with That Quiz — where test making and test taking are made easy for math and other subject areas.