Diamond Koi – a dazzling ornamental fish with sparkling scales and elegant fins. Perfect for outdoor ponds and large aquariums. Symbol of beauty and luck.

The Diamond Koi (Cyprinus carpio) is a premium ornamental koi variety admired for its iridescent, diamond-like scales and graceful swimming motion. Known for its sparkling appearance under sunlight, this koi is a centerpiece in any outdoor pond or large freshwater aquarium, symbolizing prosperity, beauty, and elegance.

At juvenile size, Diamond Koi typically measure 5–10 cm, but as they grow, they can reach 60–90 cm (24–36 inches) in optimal conditions. Their shimmering white and metallic hues with reflective scales make them one of the most luxurious koi varieties in the hobby.

✅ Key Features

• Size: Juveniles sold at 5–10 cm; adults can reach 90 cm

• Temperament: Peaceful and social

• Care Level: Easy to moderate

• Lifespan: 15–25 years with proper care

• Special Trait: Diamond-like sparkling scales that enhance pond aesthetics

Care Guide for Diamond Koi

✅ Tank/Pond Requirements

• Minimum Pond Size: 1,000 liters (264 gallons) for small groups

• Aquarium: Suitable for large indoor tanks (300 liters or more) when young; ponds preferred for adults

• Aquascape: Wide open swimming space, smooth rocks, and gentle water flow

• Filtration: Heavy-duty filtration system required due to koi’s waste output

• Aeration: Provide ample oxygenation using air stones or waterfalls

✅ Water Parameters

• Temperature: 15°C – 28°C (59°F – 82°F)

• pH Level: 6.8 – 8.2

• Water Hardness: 5 – 15 dGH

• Water Changes: Regular water changes essential for maintaining clarity and quality

Diamond Koi are cold-hardy and can adapt to a wide range of temperatures, making them excellent for outdoor ponds.

✅ Feeding Habits

Diamond Koi are omnivores that enjoy a varied diet to maintain vibrant colors and health.

• Recommended Diet:

  • High-quality koi pellets

  • Fresh vegetables (peas, spinach, lettuce)

  • Fruits (orange slices, watermelon in moderation)

  • Occasional protein treats (earthworms, shrimp)

Feed once or twice daily, reducing feeding during cooler months when metabolism slows.

✅ Tank Mates

Diamond Koi are peaceful and social and do well with other large pond fish.

Ideal Companions:

• Other koi varieties

• Goldfish (Comet, Shubunkin, Oranda)

• Large, non-aggressive bottom dwellers (Plecos)

Avoid small or delicate fish that may be outcompeted for food.

✅ Behavior & Breeding

• Behavior: Friendly, active swimmers that often recognize and interact with their owners

• Breeding: Spawns in warm conditions; requires spawning mats or aquatic plants

• Egg Care: Remove eggs to prevent them from being eaten

Why Choose Diamond Koi?

• Brilliant sparkling scales that make ponds glow under sunlight

• Symbol of beauty, good fortune, and longevity

• Easy to care for with proper setup

• Perfect for koi collectors and pond enthusiasts

✅ Ideal for ornamental ponds, water gardens, and large display tanks
✅ A true showpiece among koi varieties