Male Blue Diamond Guppy

Introduction

The Blue Diamond Guppy is a visually stunning ornamental fish prized for its rich, iridescent blue coloration and elegant tail. Its shimmering scales and peaceful temperament make it a favorite in community aquariums, particularly among beginner and experienced aquarists alike.

Scientific Name

Poecilia reticulata (Blue Diamond strain)

Common Name

• Blue Diamond Guppy

• Blue Guppy

Water Quality and Temperature

• Temperature: 22°C – 28°C (72°F – 82°F)

• pH: 6.8 – 7.8

• Hardness: 8 – 12 dGH

• Prefers clean, well-filtered water with gentle flow and stable conditions

Feeding

• Omnivorous

• Diet includes:

  • Micro pellets or flakes

  • Baby brine shrimp

  • Daphnia

  • Bloodworms (as an occasional treat)

  • Blanched vegetables like spinach or zucchini

Tank Mates

• Ideal with peaceful species such as:

  • Tetras

  • Corydoras

  • Mollies

  • Endler’s Livebearers

  • Dwarf Gouramis

  • Shrimp and small snails

Substrates and Tank Decorations

• Fine sand or smooth gravel

• Decor with driftwood, small rocks , and gentle currents

• Plenty of swimming space and hiding spots to reduce stress

Suitable Plants

• Java Fern

• Water Wisteria

• Amazon Sword

• Hornwort

• Floating plants (e.g., Frogbit) for shelter and fry protection

Sexing

• Males: Smaller, vibrant blue, elaborate tails and gonopodium

• Females: Larger, less vivid coloration, rounded anal fin

Breeding

• Very easy; they are livebearers

• Gestation: About 28 days

• Fry should be separated or provided dense plant cover to avoid predation

• Feed fry powdered food, infusoria, or baby brine shrimp

Maximum Size and Longevity

• Size: 3.5 – 5 cm (1.4 – 2 inches)

• Lifespan: 1.5 – 3 years

General Information

Blue Diamond Guppies are peaceful, easy to care for, and bring elegance to any tank with their glowing, sapphire-blue appearance. They thrive in groups and do best in well-maintained aquariums with stable water parameters.

A Fun Fact

Blue Diamond Guppies can “flash” their colors more intensely under optimal lighting, making them living jewels in a well-lit aquarium!