Threadfin Acara (Acarichthys Heckelii 12-15cm)

Acarichthys Heckelii (12–15 cm) – also known as the Threadfin Acara, a stunning South American cichlid with flowing fin extensions and peaceful temperament.

The Acarichthys Heckelii, commonly called the Threadfin Acara or Heckel’s Threadfin Cichlid, is a captivating freshwater species native to Amazonian river systems in South America. Renowned for its elongated fin extensions, iridescent silver body, and elegant red and blue highlights, this cichlid adds a touch of sophistication to large aquariums.

At 12–15 cm, these juveniles are well on their way to their adult size of 20–25 cm (8–10 inches), making them an excellent choice for experienced aquarists with spacious setups. Despite their size, Acarichthys Heckelii are generally peaceful for a cichlid, making them suitable for large community tanks with compatible species.

✅ Key Features

• Size: 12–15 cm juvenile; adults reach 20–25 cm

• Temperament: Peaceful to semi-aggressive

• Care Level: Moderate

• Lifespan: 8–10 years with proper care

• Special Trait: Elegant thread-like fin extensions and metallic sheen

Care Guide for Acarichthys Heckelii

✅ Tank Requirements

• Minimum Tank Size: 300 liters (80 gallons) for a pair or small group

• Aquascape: Fine sand substrate, driftwood, caves, and plants

• Filtration: Strong and efficient for clean water and oxygenation

• Lighting: Moderate to highlight their shimmering body colors

• Lid Required: Yes, as cichlids can jump when startled

✅ Water Parameters

• Temperature: 24°C – 28°C (75°F – 82°F)

• pH Level: 6.0 – 7.5 (slightly acidic to neutral)

• Water Hardness: Soft to moderately hard

• Maintenance: Weekly 30–40% water changes for stable conditions

✅ Feeding Habits

Acarichthys Heckelii are omnivorous and appreciate a mixed diet.

• Recommended Diet:

  • High-quality cichlid pellets

  • Frozen or live foods (bloodworms, brine shrimp, small fish)

  • Blanched vegetables (spinach, zucchini, peas)

Feed once or twice daily in moderate amounts to prevent waste buildup.

✅ Tank Mates

Heckel’s Threadfin Cichlids are relatively peaceful compared to most large cichlids, but tank mates should still be chosen wisely.

Suitable Companions:

• Other large peaceful cichlids (Severums, Geophagus species)

• Large catfish (Plecos, Doradids)

• Robust schooling fish (Silver Dollars, larger Tetras)

Avoid small or overly aggressive fish.

✅ Behavior & Personality

• Behavior: Calm and elegant swimmers; prefer lower to mid-water levels

• Activity: Territorial during spawning but otherwise peaceful

• Special Note: Known for intricate digging behavior and creating spawning pits in sand

Why Choose Acarichthys Heckelii?

• One of the most beautiful South American cichlids with flowing fins

• Perfect centerpiece fish for large community tanks

• Adds elegance and grace to biotope or showcase aquariums

✅ Ideal for Amazon-themed tanks or large cichlid communities
✅ A rare, exotic species highly prized by advanced aquarists