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HB Blue Guppies (Half Black Blue Guppies) are a popular and visually striking variety of guppies, characterized by their unique color pattern that combines a half-black body with vibrant blue accents. They are sought after for their beauty and relative ease of care. Here are some details about them:

### Appearance
- **Color**: The front half of the body is a bright, metallic blue, while the back half is black. This contrast creates a striking visual effect.
- **Size**: Males typically grow to about 1.2 inches (3 cm), while females can reach up to 2.4 inches (6 cm).
- **Fins**: Males often have larger and more elaborate fins compared to females, with the blue color often extending into the fins.

### Habitat
- **Water Temperature**: Prefer temperatures between 72-82°F (22-28°C).
- **pH Level**: Thrive in a pH range of 6.8 to 7.8.
- **Hardness**: Suitable for moderately hard water.

### Diet
- **Omnivorous**: Eat a variety of foods including high-quality flake food, pellets, live or frozen foods (such as brine shrimp, daphnia, and bloodworms), and vegetable matter.
- **Supplementary Food**: Can be fed blanched vegetables like spinach or zucchini for additional nutrition.

### Breeding
- **Ease of Breeding**: Like other guppies, HB Blue Guppies are livebearers and breed easily in captivity.
- **Mating**: Females give birth to live fry approximately every 30 days.
- **Fry Care**: Fry can be left in the main tank if there are plenty of hiding places, but they are often moved to a separate breeding tank to avoid predation.

### Tank Mates
- **Compatibility**: Best kept with other peaceful fish species like tetras, mollies, and other guppies.
- **Behavior**: Generally peaceful but males can sometimes be aggressive towards each other, especially in overcrowded conditions.

### Tank Setup
- **Plants and Hiding Places**: Benefit from a well-planted tank with plenty of hiding spots.
- **Tank Size**: A minimum of 10 gallons is recommended for a small group of guppies.
- **Filtration**: A good filtration system is essential to maintain water quality.

### Maintenance
- **Water Changes**: Regular water changes (about 25% weekly) are important to keep the water clean.
- **Health Monitoring**: Watch for signs of disease, such as white spots (indicative of ich) or fin rot.

HB Blue Guppies are a vibrant and engaging addition to any community tank. Their unique coloration and active nature make them a favorite among aquarists. With proper care, they can thrive and provide a stunning visual appeal to the aquarium.