Photo: Jarne Colman (CC0) — via Wikimedia Commons
Clown Pleco (Panaqolus maccus)
A thumb-sized, boldly striped armoured catfish that stays small, rasps driftwood all day, and never outgrows a modest community tank.
Will it live with a Clown Pleco?
We compare each fish against your clown pleco on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- African Butterfly Cichlid✅ CompatibleSemi-aggressive · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Agassiz's Dwarf Cichlid✅ CompatibleSemi-aggressive · 9 cm · Medium care · 24–30 °C (75–86 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Badis✅ CompatibleSemi-aggressive · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Bamboo Shrimp✅ CompatiblePeaceful · 8 cm · Medium care · 22–27 °C (72–81 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Bearded Corydoras✅ CompatiblePeaceful · 10 cm · Medium care · 18–24 °C (64–75 °F)
- Both are peaceful, and their water overlaps around 24–24 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Black Kuhli Loach✅ CompatiblePeaceful · 8 cm · Easy care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Bolivian Ram✅ CompatiblePeaceful · 8 cm · Medium care · 24–28 °C (75–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Brilliant Rasbora✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Brilliant Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Burmese Loach✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Cockatoo Dwarf Cichlid✅ CompatibleSemi-aggressive · 8 cm · Medium care · 24–28 °C (75–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Dwarf Gourami✅ CompatibleSemi-aggressive · 8 cm · Medium care · 24–28 °C (75–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Glass Catfish✅ CompatiblePeaceful · 8 cm · Medium care · 23–28 °C (73–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Glass Catfish in a shoal of 6+ or it gets stressed and nippy.
- Golden Wonder Killifish✅ CompatibleSemi-aggressive · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keyhole Cichlid✅ CompatiblePeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Kribensis✅ CompatibleSemi-aggressive · 10 cm · Easy care · 24–27 °C (75–81 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Kuhli Loach✅ CompatiblePeaceful · 10 cm · Easy care · 24–30 °C (75–86 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Leopard Frog Pleco✅ CompatiblePeaceful · 9 cm · Medium care · 25–30 °C (77–86 °F)
- Both are peaceful, and their water overlaps around 25–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Molly✅ CompatiblePeaceful · 10 cm · Easy care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Paradise Fish✅ CompatibleAggressive · 10 cm · Medium care · 16–26 °C (61–79 °F)
- Peaceful + Aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Porthole Catfish✅ CompatiblePeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Rosy Barb✅ CompatibleSemi-aggressive · 10 cm · Easy care · 18–26 °C (64–79 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Rosy Barb in a shoal of 6+ or it gets stressed and nippy.
- Thick-lipped Gourami✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Topaz Cichlid✅ CompatibleSemi-aggressive · 10 cm · Medium care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Zebra Pleco✅ CompatiblePeaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
- Compatible on the things that matter: shared water near 26–28 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Afra Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 24–28 °C (75–82 °F)
- Different pH ranges (6.5–7.5 vs 7.8–8.6); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Keep Afra Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Bandit Cichlid⚠️ With cautionSemi-aggressive · 9 cm · Medium care · 22–26 °C (72–79 °F)
- Your 80 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Keep Bandit Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Brichardi Cichlid⚠️ With cautionSemi-aggressive · 9 cm · Medium care · 24–28 °C (75–82 °F)
- Different pH ranges (6.5–7.5 vs 7.8–9); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Clown Rasbora⚠️ With cautionPeaceful · 10 cm · Medium care · 23–28 °C (73–82 °F)
- Your 80 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Clown Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Convict Cichlid⚠️ With cautionAggressive · 10 cm · Easy care · 21–28 °C (70–82 °F)
- Your 80 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Daffodil Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 23–27 °C (73–81 °F)
- pH preferences only just meet (Clown Pleco 6.5–7.5 vs Daffodil Cichlid 7.8–9) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Demasoni Cichlid⚠️ With cautionAggressive · 9 cm · Hard care · 23–27 °C (73–81 °F)
- Different pH ranges (6.5–7.5 vs 7.8–8.6); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep Demasoni Cichlid in a shoal of 12+ or it gets stressed and nippy.
- Electric Yellow Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 23–26 °C (73–79 °F)
- Different pH ranges (6.5–7.5 vs 7.8–8.9); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Giant Danio⚠️ With cautionPeaceful · 10 cm · Easy care · 20–27 °C (68–81 °F)
- Your 80 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Giant Danio in a shoal of 6+ or it gets stressed and nippy.
- Johanni Cichlid⚠️ With cautionAggressive · 10 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Clown Pleco 6.5–7.5 vs Johanni Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep Johanni Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Lifalili Jewel Cichlid⚠️ With cautionAggressive · 9 cm · Medium care · 22–28 °C (72–82 °F)
- Your 80 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Mexican Tetra⚠️ With cautionSemi-aggressive · 9 cm · Easy care · 18–25 °C (64–77 °F)
- Your 80 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Mexican Tetra in a shoal of 6+ or it gets stressed and nippy.
- Rusty Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Clown Pleco 6.5–7.5 vs Rusty Cichlid 7.8–8.5) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Silver Tetra⚠️ With cautionPeaceful · 9 cm · Easy care · 24–28 °C (75–82 °F)
- Your 80 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Keep Silver Tetra in a shoal of 6+ or it gets stressed and nippy.
- Tanganyikan Butterfly Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Hard care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Clown Pleco 6.5–7.5 vs Tanganyikan Butterfly Cichlid 8–9) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~130 L this pairing really wants — crowding raises aggression.
- Zebra Loach⚠️ With cautionPeaceful · 9 cm · Medium care · 23–26 °C (73–79 °F)
- Your 80 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Goldfish⛔ Not recommendedPeaceful · 30 cm · Medium care · 18–22 °C (64–72 °F)
- Temperature needs don't overlap (Clown Pleco 24–28 °C vs Goldfish 18–22 °C).
- Goldfish may bully the smaller Clown Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Imperial Flower Loach⛔ Not recommendedSemi-aggressive · 50 cm · Hard care · 15–22 °C (59–72 °F)
- Temperature needs don't overlap (Clown Pleco 24–28 °C vs Imperial Flower Loach 15–22 °C).
- Water hardness preferences differ (Clown Pleco 2–10 vs Imperial Flower Loach 12–25 dGH).
- Imperial Flower Loach may bully the smaller Clown Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Panda Loach⛔ Not recommendedPeaceful · 6 cm · Hard care · 18–23 °C (64–73 °F)
- Temperature needs don't overlap (Clown Pleco 24–28 °C vs Panda Loach 18–23 °C).
Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.
Clown Pleco care specs
- Care level
- Medium
- Breeding
- Hard
- Max size
- 9 cm (3.5 in)
- Min tank size
- 80 L (21.1 gal)
- Temperature
- 24–28 °C (75–82 °F)
- pH
- 6.5–7.5
- Hardness
- 2–10 dGH
- Lifespan
- 8–12 years
- Diet
- Herbivore
- Swim level
- Bottom
- Group size
- Best alone or in a pair
- Family
- Loricariidae
- Origin
- Venezuela — Orinoco basin (Apuré and Caroní River systems)
What is a Clown Pleco?
The clown pleco (Panaqolus maccus) is a small, boldly patterned armoured catfish from Venezuela — and one of the best-kept secrets in the fishkeeping hobby. Where its notorious cousin the common pleco can reach 45 cm (18 in) and overwhelm most home aquariums, the clown pleco tops out at just 9 cm (3.5 in), making it genuinely manageable for a mid-sized community tank.
The “clown” name refers to its vivid colouration: a dark brown to near-black body is broken by wavy, irregular bands of cream or pale yellow — a pattern that varies from fish to fish and stays striking for the animal’s entire life. It belongs to the family Loricariidae, the suckermouth catfish, and shares that family’s hallmark armoured flanks, underslung mouth, and preference for rasping surfaces rather than chasing prey.
Clown plecos carry multiple L-numbers (L104, L162, LDA22) because specimens collected from different river systems were logged before taxonomists confirmed they were the same species. All names refer to Panaqolus maccus, and care is identical across them.
Where do Clown Plecos come from?
Wild clown plecos inhabit the Orinoco basin in Venezuela, specifically the Apuré and Caroní river systems and their tributaries. These are warm, fast-moving rivers and streams with soft, slightly acidic to neutral water, low mineral content, and abundant submerged wood — fallen branches, root tangles and driftwood piles form the core of this fish’s habitat.
In the wild, clown plecos wedge themselves into crevices and gaps in woody debris during daylight hours, emerging at dusk to rasp algae and biofilm from wood surfaces. The availability of driftwood is not incidental to their ecology — it is central to it, which is why replicating that element in captivity matters so much.
What size tank does a Clown Pleco need?
The minimum recommended tank size is 80 litres (21 gallons). A clown pleco’s small adult size of 9 cm (3.5 in) can make this seem generous, but the real driver is water stability and territory: these fish are bottom-dwellers that claim cave territories, and a cramped tank with one cave will produce persistent low-level stress even in a peaceful species.
Footprint matters more than height. A longer, lower tank gives more bottom territory and more surface area for wood placement. A tank in the 80–120 L (21–32 gal) range suits a single clown pleco well; if you plan to keep one alongside other bottom-dwellers, size up accordingly and furnish each species with its own defined space.
A lid is good practice — clown plecos rarely jump, but it also helps maintain the humid, warm surface air the tank needs.
What water parameters do Clown Plecos need?
- Temperature: 24–28 °C (75–82 °F) — consistent warmth is important; avoid dips below 22 °C.
- pH: 6.5–7.5, leaning toward neutral or slightly acidic.
- Hardness: 2–10 dGH — soft to moderately hard. Hard, alkaline tap water is tolerated short-term but is not ideal for long-term health.
Many fishkeepers keep clown plecos successfully in standard, dechlorinated tap water that falls in the neutral range. What they do poorly with is extremes: prolonged hard, alkaline conditions, or sudden temperature swings. A reliable heater and a cycled, well-maintained filter are the two most important pieces of equipment.
Good oxygenation is beneficial — the fast-moving Orinoco tributaries these fish come from are well-aerated. A moderate flow rate from the filter, or a small additional powerhead, replicates that and helps keep organic waste from building up around the wood and substrate.
What do Clown Plecos eat?
The clown pleco is a wood-rasping herbivore, and that distinction matters. Unlike many other pleco species that eat primarily algae and are content to vacuum up leftovers, Panaqolus maccus is specifically adapted to rasp lignocellulose from driftwood. In practice this means driftwood is a dietary requirement, not just decor. A tank without it leaves the fish nutritionally incomplete regardless of how many wafers you add.
Supplement the driftwood with:
- Sinking algae or spirulina wafers — offered a few times per week in the evening
- Blanched vegetables — courgette (zucchini), cucumber medallions, sweet potato, and green beans all go down well; remove uneaten pieces after 24 hours
- Occasional dried leaves — Indian almond or catappa leaves add tannins and a natural foraging surface
Clown plecos largely ignore meaty or protein-rich foods. They will not reliably clean up leftover fish food or control pest snail populations — that is not their role. Feed specifically for them, especially if housed with active mid-water fish that consume food before it sinks.
Are Clown Plecos aggressive — and what fish can live with them?
Clown plecos are peaceful toward other species and cause no issues in a well-planned community tank. The one caveat is intraspecific: males are territorial over caves and sheltered wood sections. Two males in a small tank with a single cave will squabble repeatedly. The practical solution is simple — provide one cave or clay tube per fish, and keep sightlines broken by wood and plants so that animals cannot constantly monitor each other’s territory.
Suitable tank mates include peaceful mid-water schooling fish (tetras, rasboras), surface-oriented species, and other mild-mannered bottom dwellers that use different microhabitats. Avoid large aggressive cichlids, and be cautious with other territorial cave-dwelling catfish in smaller tanks.
For a detailed, filterable list of compatible species, see Clown Pleco tank mates.
How do you tell male and female Clown Plecos apart?
Sexing clown plecos requires patience — juveniles under roughly 5–6 cm are nearly impossible to sex reliably. In mature adults, the differences are clear:
Males develop elongated odontodes — stiff, bristle-like spines — on the pectoral fin rays and along the sides of the head and cheeks. Under good light these give the male’s head a noticeably rougher, more textured appearance. The odontodes on the pectoral fins are particularly prominent and visible when the fish spreads its fins.
Females lack significant odontode development and appear smoother along the head and fins. When viewed from above, a conditioned, well-fed female is noticeably broader across the body — the widest point behind the pectoral fins is a good reference.
How do Clown Plecos breed?
Clown pleco breeding is rated hard and is not a casual undertaking, but it has been achieved in home aquaria. They are cave spawners: the male selects and guards a tight cave or hollow log, courts the female, and spawning occurs inside the enclosed space. The male then guards the eggs and fans them until hatching, which typically takes around five to seven days at warm temperatures.
Key conditions that improve breeding success:
- A mature, stable tank with excellent water quality
- A selection of tight-fitting caves or sections of hollow wood sized to the male (he should barely fit in)
- Conditioning both fish on varied, high-quality vegetable matter in the weeks prior
- A slight drop and then rise in temperature, or increased water changes, can act as a spawning trigger
Raising fry is the most challenging aspect. The young need access to established driftwood immediately, as their digestive system is adapted to wood-rasping from the start. Daphnia and very fine commercial fry foods can supplement, but driftwood availability is the non-negotiable factor. Breeding success rates are low without significant experience and a purpose-set breeding tank.
What are common Clown Pleco diseases?
Clown plecos are hardy when water conditions are stable, but they are susceptible to the same ailments that affect most freshwater fish:
Ich (white spot): The classic white pinhead spots on fins and body, usually triggered by a temperature drop or stress. Prevention is primarily about avoiding temperature swings and quarantining new arrivals.
Bacterial infections and fin damage: Rough handling, sharp decor, or poor water quality can create wounds on the soft belly skin (the underside is unarmoured). Keep the substrate smooth and maintain water quality to prevent secondary infection.
Internal parasites: Wild-caught or newly imported specimens may carry parasites. A quarantine period of 4–6 weeks before introducing any new fish is the most effective prevention.
Bloat and digestive issues: Almost always traced to an insufficient driftwood supply. A clown pleco that cannot rasp wood regularly will show signs of poor condition over weeks to months. The fix is simple: add more wood.
Health note: symptoms of fish disease can overlap significantly between conditions. Confirm what you are observing against a reputable veterinary or fish-health source before reaching for any treatment.
How long do Clown Plecos live?
A well-kept clown pleco lives 8–12 years — a lifespan that puts it in the same bracket as many larger fish and well above what most keepers expect from a small catfish. That longevity is one of the strongest arguments for getting the setup right from the start: driftwood, appropriate water parameters, a cave, and stable conditions are a one-time investment that pays off across a decade of a quietly fascinating, low-drama tank resident.
Frequently asked questions
Do clown plecos really need driftwood in the tank?
Yes — driftwood is not optional decor for a clown pleco, it is a dietary requirement. They rasp lignocellulose from wood as a core part of their nutrition, and a tank without it leads to poor digestion and a shorter life. Bogwood or Malaysian driftwood works well. Supplement with sinking algae wafers, zucchini, and cucumber, but always keep at least one piece of wood in the tank.
Will a clown pleco replace a common pleco in a community tank?
It is a far better fit for most home aquariums. The common pleco (Pterygoplichthys pardalis) can reach 45 cm and bulldoze plants; the clown pleco tops out around 8–9 cm and is genuinely peaceful. A single specimen is content alone, though two males will squabble over caves, so provide one cave or clay tube per fish and keep tank mates mild-mannered.
What you need to keep a clown pleco
The baseline is a heated, filtered 80 L+ tank: a reliable heater to hold 24–28 °C (75–82 °F), a gentle filter that won't batter a clown pleco in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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