(P21) Pacu

Description

Pacu 

📌 Basic Info

Scientific Name: Colossoma macropomum
Common Names: Pacu,Freshwater Pacu
Family: Serrasalmidae (Pacus & Piranhas)
Order: Characiformes
Origin: South America — Amazon and Orinoco river basins
Size: Up to 3 feet (90 cm) in captivity; can grow larger in the wild
Lifespan: 15 – 20 years
Tank Zone: Mid to upper-level dweller; peaceful and social

🌊 Water Parameters

TDS: 150 – 300 ppm
pH: 6.0 – 7.5
Temperature: 24 – 28°C (75 – 82°F)
Hardness: 5 – 15 dGH

🐟 Characteristics

Body: Large, laterally compressed body, slightly rounded head, and strong jaws; resembles a piranha but herbivorous.
Behavior: Peaceful, social, and usually kept in groups; can be curious and intelligent.
Swimming Style: Slow to moderate swimmer; explores mid-to-upper levels of the tank.
Unique Feature: Strong teeth for crushing nuts, seeds, and fruits; herbivorous tendencies.
Nature: Hardy, social, and suitable for very large aquariums or outdoor ponds.

🍽️ Food

Type: Omnivorous (mostly herbivorous)
Diet: Fresh vegetables, fruits, leafy greens, high-quality pellets, occasional frozen foods
Feeding: Once or twice daily in moderate amounts
Tip: Avoid feeding only meat; provide varied plant-based diet for optimal health

🛠️ Maintenance

Tank Size: Minimum 1000 gallons (3,800 L) for adults; ponds preferred
Filtration: Powerful filtration required; heavy waste producers
Decor: Mostly open swimming space; strong plants may be uprooted
Lighting: Moderate
Water Change: 25–30% weekly to maintain water quality

👥 Social Behavior

Minimum Group Size: 2–3 or more for social interaction
Tank Mates: Other large peaceful fish; avoid small fish
Avoid: Small, delicate, or slow-moving species

✅ Do’s

• Provide very large tanks or ponds with ample swimming space

• Feed a varied diet with plenty of plant-based foods

• Maintain excellent water quality and filtration

• Monitor growth and behavior; can live decades

❌ Don’ts

• Don’t keep in small tanks — will outgrow quickly

• Don’t house with small fish

• Don’t ignore water quality or filtration

⭐ Quick Tips

The Pacu is a large, peaceful, and long-living freshwater fish, ideal for massive aquariums or outdoor ponds.
It displays social behavior in small groups and adds a majestic silver presence to the tank or pond.
Its herbivorous tendencies, intelligence, and hardiness make it a robust and fascinating showpiece fish for experienced aquarists.