Description
🐟 Black Bristlenose Pleco (Ancistrus sp.)
📌 Basic Info
Scientific Name: Ancistrus sp.
Family: Loricariidae
Origin: South America (Amazon River Basin)
Size: 4 – 6 inches (10 – 15 cm)
Lifespan: 5 – 10 years
Tank Zone: Bottom dweller
🌊 Water Parameters
TDS: 150 – 300 ppm
pH: 6.5 – 7.8
Temperature: 22 – 27°C (72 – 81°F)
Hardness: 2 – 12 dGH
🐟 Characteristics
Deep black or dark brown body, sometimes with faint spots.
Males develop bristle-like whiskers on their snout.
Peaceful, hardy, and one of the best algae eaters.
Stays much smaller than Common Plecos, making them perfect for community tanks.
Mostly nocturnal but will come out during the day in a safe environment.
🍽️ Food
Type: Omnivorous with a preference for plant-based food.
Diet: Algae wafers, spirulina pellets, zucchini, cucumber, spinach, peas, and driftwood (fiber aid). Occasional protein like bloodworms.
Feeding: Once daily; remove uneaten veggies after 24 hours.
🛠️ Maintenance
Tank Size: Minimum 30 gallons for one adult.
Filtration: Strong filter, well-oxygenated water.
Decor: Driftwood, caves, hiding places, and plants.
Water Change: 25–30% weekly.
👥 Social Behavior
Minimum Group Size: Can live alone or in pairs; avoid too many males in small tanks (territorial).
Tank Mates: Guppies, Tetras, Mollies, Corydoras, Gouramis, Rasboras, and peaceful Cichlids.
Avoid: Aggressive or very large fish that may bully them.
✅ Do’s
Provide driftwood – helps digestion.
Keep hiding spots (caves, plants, wood).
Offer vegetables along with algae wafers.
❌ Don’ts
Don’t rely only on algae for their food.
Don’t keep them in very small tanks (<20 gallons).
Don’t overcrowd males in a small space.
⭐ Quick Tips
Black Bristlenose Plecos are small, hardy, and beginner-friendly algae eaters.
Great choice for planted and community tanks.
Unlike Common Plecos, they don’t outgrow normal aquariums





