Common Bristlenose (Ancistrus cirrhosus)

Description

Common Bristlenose (Ancistrus cirrhosus)

One of the best algae-eating fish for freshwater aquariums, the Common Bristlenose is a hardy, peaceful and hardworking catfish that stays a manageable size while helping keep your aquarium looking its best.

Quick Facts

  • Scientific name: Ancistrus cirrhosus
  • Common name: Common Bristlenose, Bristlenose Pleco
  • Adult size: 10–13 cm
  • Tank size: 80L+ recommended
  • Difficulty: 🟢 Very Easy
  • Temperament: Peaceful
  • Best kept: Individually, pairs or small groups with adequate space

Is this for you?

✔️ Perfect if:

  • You want a reliable algae-eating fish.
  • You keep a planted community aquarium.
  • You're looking for a hardy beginner-friendly catfish.
  • You want a Pleco that stays relatively small.

❌ Avoid if:

  • You have an aquarium under 80 litres.
  • You expect them to survive only on algae.
  • You don't provide driftwood.
  • You keep aggressive bottom-dwelling fish in small aquariums.

Why choose the Common Bristlenose?

The Common Bristlenose has earned its reputation as one of the most useful fish in the freshwater hobby. Unlike Common Plecos that can exceed 40cm, Bristlenose remain compact enough for most home aquariums while still being outstanding algae grazers.

Their mottled brown body provides excellent camouflage amongst driftwood and plants, while mature males develop the distinctive fleshy bristles on their snout that give the species its name.

Peaceful, hardy and full of personality, Bristlenose spend much of their day grazing on algae, biofilm and driftwood before becoming more active during the evening.

Benefits

  • Excellent algae grazer
  • Ideal size for home aquariums
  • Peaceful community fish
  • Hardy and beginner friendly
  • Can be bred in home aquariums
  • Suitable for planted tanks

Care made simple

  • Temperature: 22–28°C
  • pH: 6.5–7.8
  • Diet: Algae wafers, sinking pellets, fresh vegetables, driftwood and occasional frozen foods
  • Water: Clean, mature and well-filtered
  • Setup: Driftwood, caves, shaded areas and moderate water movement
  • Provide driftwood as a natural part of their diet and digestion.

Pairs perfectly with

  • Corydoras
  • Rainbowfish
  • Barbs
  • Gouramis
  • Apistogramma
NTA Insight:
The Common Bristlenose is one of the first fish we recommend when customers ask for an algae eater—but not because they'll magically clean your aquarium. Healthy Bristlenose are well-fed Bristlenose. They love grazing on algae, but they also need vegetables, quality sinking foods and driftwood to stay in peak condition. Treat them as a pet first and a cleaner second, and they'll reward you for many years.

FAQ

How big do Common Bristlenose get?

Most adults grow to around 10–13 cm, making them an excellent alternative to Common Plecos, which become far too large for most home aquariums.

Do Bristlenose really eat algae?

Yes. They are excellent algae grazers, particularly on soft algae and biofilm. However, they still require a complete diet and should not be expected to survive solely on algae.

Why is driftwood important?

Bristlenose naturally rasp on driftwood, which provides valuable fibre and supports healthy digestion. Driftwood should be considered an essential part of their aquarium.

Can Common Bristlenose breed in home aquariums?

Yes. They are one of the easiest Plecos to breed. Males guard the eggs inside caves until they hatch, making them fascinating fish to observe.

How can I tell males from females?

Mature males develop long, prominent bristles across the centre of the snout, while females typically have much smaller bristles around the edge of the nose or none at all.

Common Bristlenose (Ancistrus cirrhosus)

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Free pickup in our shop(s)
📍 In-Store Locations: GUP2-21 • GUP2-22 • GUP2-23 • GUP2-24 • GUP2-25
📦 Arrival Date: 19 April 2026

8 in stock  

$15.00


All prices include GST
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    Description

    Common Bristlenose (Ancistrus cirrhosus)

    One of the best algae-eating fish for freshwater aquariums, the Common Bristlenose is a hardy, peaceful and hardworking catfish that stays a manageable size while helping keep your aquarium looking its best.

    Quick Facts

    • Scientific name: Ancistrus cirrhosus
    • Common name: Common Bristlenose, Bristlenose Pleco
    • Adult size: 10–13 cm
    • Tank size: 80L+ recommended
    • Difficulty: 🟢 Very Easy
    • Temperament: Peaceful
    • Best kept: Individually, pairs or small groups with adequate space

    Is this for you?

    ✔️ Perfect if:

    • You want a reliable algae-eating fish.
    • You keep a planted community aquarium.
    • You're looking for a hardy beginner-friendly catfish.
    • You want a Pleco that stays relatively small.

    ❌ Avoid if:

    • You have an aquarium under 80 litres.
    • You expect them to survive only on algae.
    • You don't provide driftwood.
    • You keep aggressive bottom-dwelling fish in small aquariums.

    Why choose the Common Bristlenose?

    The Common Bristlenose has earned its reputation as one of the most useful fish in the freshwater hobby. Unlike Common Plecos that can exceed 40cm, Bristlenose remain compact enough for most home aquariums while still being outstanding algae grazers.

    Their mottled brown body provides excellent camouflage amongst driftwood and plants, while mature males develop the distinctive fleshy bristles on their snout that give the species its name.

    Peaceful, hardy and full of personality, Bristlenose spend much of their day grazing on algae, biofilm and driftwood before becoming more active during the evening.

    Benefits

    • Excellent algae grazer
    • Ideal size for home aquariums
    • Peaceful community fish
    • Hardy and beginner friendly
    • Can be bred in home aquariums
    • Suitable for planted tanks

    Care made simple

    • Temperature: 22–28°C
    • pH: 6.5–7.8
    • Diet: Algae wafers, sinking pellets, fresh vegetables, driftwood and occasional frozen foods
    • Water: Clean, mature and well-filtered
    • Setup: Driftwood, caves, shaded areas and moderate water movement
    • Provide driftwood as a natural part of their diet and digestion.

    Pairs perfectly with

    • Corydoras
    • Rainbowfish
    • Barbs
    • Gouramis
    • Apistogramma
    NTA Insight:
    The Common Bristlenose is one of the first fish we recommend when customers ask for an algae eater—but not because they'll magically clean your aquarium. Healthy Bristlenose are well-fed Bristlenose. They love grazing on algae, but they also need vegetables, quality sinking foods and driftwood to stay in peak condition. Treat them as a pet first and a cleaner second, and they'll reward you for many years.

    FAQ

    How big do Common Bristlenose get?

    Most adults grow to around 10–13 cm, making them an excellent alternative to Common Plecos, which become far too large for most home aquariums.

    Do Bristlenose really eat algae?

    Yes. They are excellent algae grazers, particularly on soft algae and biofilm. However, they still require a complete diet and should not be expected to survive solely on algae.

    Why is driftwood important?

    Bristlenose naturally rasp on driftwood, which provides valuable fibre and supports healthy digestion. Driftwood should be considered an essential part of their aquarium.

    Can Common Bristlenose breed in home aquariums?

    Yes. They are one of the easiest Plecos to breed. Males guard the eggs inside caves until they hatch, making them fascinating fish to observe.

    How can I tell males from females?

    Mature males develop long, prominent bristles across the centre of the snout, while females typically have much smaller bristles around the edge of the nose or none at all.

    Live Arrival & Ordering FAQ

    Why do livestock prices sometimes change?

    Unlike manufactured products, fish and shrimp continue to grow and develop over time. Their value changes as they increase in size, develop colour, or become breeding pairs.

    Our prices are based on the current size, quality and availability of each specimen. While pricing often remains stable for around 3–4 months, it may be updated at any time to reflect these changes.

    We always aim to offer healthy, high-quality livestock at fair and competitive prices.

    Do you offer a live arrival guarantee?

    Yes. All livestock is covered by our Live Arrival Guarantee.

    In the rare event of DOA, please contact us promptly with clear photos of the livestock in the original unopened bag.

    Please review our full DOA and store policies before purchase.

    Can you ship to all states in Australia?

    No. Due to state restrictions, we cannot ship livestock or live plants to WA and TAS.

    What should I check before ordering?

    Before placing an order, make sure:

    • Your tank is fully cycled and stable
    • Your aquarium has enough space for the species
    • Your current livestock are compatible in temperament, size, and requirements
    • Your water parameters, habitat, and temperature suit the species
    • You are not adding too many fish at once
    What should I expect when my fish arrives?

    It is normal for fish, shrimp, or snails to look pale, stressed, or less active after shipping.

    This is temporary. Most livestock will settle and regain colour within a few days.

    How long does it take for fish to settle in?

    Most livestock will take 3–7 days to fully adjust to their new environment.

    Should I feed my fish immediately after arrival?

    No. We recommend waiting 24 hours before feeding to allow them to settle.

    If you already have fish in your tank, feeding them before introducing new arrivals can help reduce stress.

    Why do fish sometimes struggle after being added to a tank?

    In most cases, issues are caused by tank conditions, not shipping.

    • Uncycled or unstable tanks
    • Poor water parameters
    • Overstocking
    • Unsuitable tank mates
    What is Nano Tanks Australia’s main tip for new livestock?

    Most livestock losses happen in immature or unstable tanks, not during shipping.

    If your setup is not fully established, the risk to new arrivals is significantly higher.

    Not sure if this fish is right for your setup?

    If you are unsure whether this species suits your setup, contact us before ordering and we’ll help point you in the right direction.

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