Freshwater Fish · Catfish
Clown Pleco
Panaqolus maccus
Secretive dwarf pleco that dines on driftwoodBeginner
- Lifespan
- 10-12 years
- Size
- 8-9 cm (3-3.5 in)
- Social needs
- Fine solo; males territorial over caves and wood
- Time
- Moderate (nightly feeds, weekly water changes and vacuuming)
- Cost
- Low-Medium
- Diet
- Xylivore — driftwood plus sinking wafers and vegetables
Overview
What is this animal?
- The Clown Pleco is a dwarf suckermouth catfish from the Caroni and Apure river drainages of Venezuela and Colombia, patterned in dark chocolate with wavy cream-to-orange bands.
- At 8-9 cm (3-3.5 in) it stays a full size class below the Bristlenose Pleco, making it one of the smaller plecos routinely sold.
- Its defining trait is that it genuinely eats wood: Panaqolus species rasp driftwood constantly, digesting the softened surface layer and the biofilm growing on it, so wood in this tank is food and dietary fibre, not furniture.
- It is also strongly nocturnal and cave-bound, and an honest keeper should expect glimpses at lights-out rather than a fish on display.
- Despite how shops sell it, this is not an algae-eating janitor.
- Choose it because you want a small, characterful wood-grazing catfish, not to clean your glass.
Temperament
- The Clown Pleco is peaceful toward everything swimming above it and spends its time wedged in wood or a cave, ignoring midwater tankmates entirely.
- It suits calm communities of tetras, rasboras, corydoras, and dwarf cichlids in soft to moderately hard water.
- The one friction point is with its own kind and other bottom-dwelling plecos, because males defend caves and prime wood with surprising stubbornness.
- Keep a single specimen in a 20 gallon tank, and only house several in larger tanks with one cave and wood pile per fish.
- Do not combine it with large aggressive cichlids that will batter a shy bottom-dweller, or with coldwater fish like goldfish, since it needs tropical temperatures.
- If you want a pleco you will actually see grazing in daylight, the Bristlenose is the better pick; the Clown is the connoisseur's hidden gem.
A good fit for
- Keepers who want a pleco smaller than a Bristlenose
- Driftwood-heavy aquascapes and blackwater-style tanks
- Peaceful tropical communities of 20 gallons and up
- Patient keepers content with a mostly hidden fish
- Long-term keepers ready for a 10-year commitment
Common mistakes to avoid
- Buying it as an algae eater; it barely touches algae
- Keeping it without driftwood, which is its actual food
- Underestimating its heavy, sawdust-like waste output
- Two males fighting over a single cave
- Wild-caught imports arriving thin or carrying parasites
- Assuming the fish is fine just because you never see it
Enclosure
Minimum 75 litres (20 US gallons) · 76 × 30 cm
Fine alone or with company. Fine solo; males territorial over caves and wood
- A 20 gallon long (75 litre, roughly 76 x 30 cm / 30 x 12 in of floor) is the sensible minimum, chosen for footprint rather than height, since this fish lives entirely on the bottom; the 10-gallon figure on older care sheets ignores its heavy waste output.
- Keep the water at 23-28C (73-82F) with pH 6.0-7.5 and soft to moderately hard conditions, and provide strong filtration, moderate flow, and good oxygenation in a fully cycled, mature tank.
- Several pieces of driftwood are mandatory, because the fish will slowly rasp them away and they must be replaced as they shrink.
- Add at least one snug cave per pleco, use sand or fine gravel, and keep lighting dim or plant-shaded so the fish ventures out more.
- Budget for real maintenance, because a wood diet produces constant sawdust-like stringy waste.
- Weekly water changes with a substrate vacuum are not optional for such a small fish with such a messy digestion.
Supplies
Setup
- Tank and stand
- Filter
- Heater and thermometer
- Substrate, plants and decor
- Liquid test kit
- Dechlorinator and starter supplies
Ongoing
- Sinking wafers or tablets for bottom-feeders
- Algae or spirulina wafers
- Frozen bloodworm, daphnia and brine shrimp
- Untreated aquarium driftwood (essential for clown plecos)
- Courgette, cucumber and spinach for blanching
- Veg clip or a stainless veg skewer
- Feeding tongs or a pipette for target-feeding
- Fine sand substrate for corydoras foraging
Safe substrate: Inert aquarium gravel · Fine, smooth sand · Aquasoil for planted tanks
Care routine
Daily
- Check temperature and equipment
- Head-count and look everyone over
- Sinking food at lights-out
Weekly
- Top up evaporationevery 3 days
- Check belly profiles
- Clean glass and clear algae
- Test the water
- Water change and gravel vacuum
Monthly
- Trim and thin the plantsevery 2 weeks
- Check supplies and reagent dates
- Check the driftwood
- Rinse the filter media
Less often
- Replace chemical filter media (Carbon/Purigen)every 2 months
Vet: Quarterly bottom-dweller review — every 3 months
Top resources for more info
Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-09-19.
YouTubers
Girl Talks FishCare how-tos by fish type, tank setup and beginner mistakesAquarium Co-OpSpecies care guides, filtration and fish health (run by a retailer)Prime Time AquaticsSpecies profiles, stocking and water chemistry explained plainly
Sites
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Diet
- Driftwood is the staple food, and a Clown Pleco kept without it will slowly starve no matter what else is offered.
- Supplement the wood nightly with sinking wafers, spirulina tablets, or a gel food, dropped in after lights-out so faster fish do not steal them.
- Offer blanched vegetables such as courgette, cucumber, and sweet potato once or twice a week, weighted down near its cave.
- Keep protein foods like bloodworm to an occasional treat, because this species' long gut is built for fibre, not meat.
- The classic failure is treating it as a clean-up crew that lives on leftovers and algae.
- Watch the belly through the glass when it clamps onto the pane, because a flat or sunken profile means it is not getting enough food.
Health
- Clown Plecos are hardy in clean, oxygenated water and commonly live 10-12 years, but they decline when nitrate creeps much past 20 ppm or when flow and oxygen are poor.
- Their armoured plates do not protect them from poor water quality, and like most loricariids they are sensitive to copper-based medications and heavy salt dosing, so treat illness in a bare quarantine tank at reduced doses.
- Most specimens in shops are still wild-caught imports, so quarantine new arrivals and expect possible internal parasites or a thin, hollow-bellied condition that needs deliberate feeding up.
- A sunken belly is the single most important warning sign, and it almost always traces back to missing driftwood or underfeeding.
- Because the fish hides all day, illness is easy to miss for weeks.
- Make an evening feed your daily health check, and confirm you have actually seen the fish eat and looked at its body condition at least once a week.
Is your enclosure big enough?
Minimum volume75 litres (20 US gallons)
Minimum floor area2,280 cm² (353 sq in) of continuous, unbroken floor
As dimensions76 x 30 cm
Swimming length30 cm minimum. A tall tank of the right volume is still the wrong shape.
CompanyFine alone or with company. Fine solo; males territorial over caves and wood
Is this urgent?
In a fish tank the patient is usually the water. Test before you treat — dosing a healthy tank for a disease it does not have makes things worse.
Go now
Any detectable ammonia or nitrite in a stocked tankLarge water change now with dechlorinated, temperature-matched water. Stop feeding. Test again in 12 hours. Both are directly toxic. How toxic the ammonia reading is depends on pH and temperature, so the same number can be harmless or lethal.
NowFish gasping at the surface, or crowding the filter outflowIncrease surface agitation immediately, then test the water. Either the oxygen has crashed or the gills are being chemically burned. Both are hours-scale problems.
NowSudden deaths, more than one fish in a dayTest ammonia, nitrite, nitrate and temperature before doing anything else. Do not add medication yet. Multiple simultaneous deaths point at the water or the equipment, not at a pathogen.
NowToday
Flashing — repeatedly scraping against decor or substrateTest the water, then look closely for parasites. Irritation is either chemical or parasitic; the test tells you which before you medicate.
TodayWhite salt-grain spots over the body and finsBegin the appropriate treatment today and check the temperature. The parasite's life cycle is temperature-driven, and it multiplies with every cycle you wait.
TodaySoon
Clamped fins, hiding, or refusing food for more than two daysTest the water and review recent changes. Usually the earliest visible sign of a parameter drifting.
A few daysNever add a new fish to a tank that is not fully cycled, and never treat blind. A test kit is cheaper than the fish.
This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it — and the time to find one is before you need one.
What it really costs
Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.
Bedding and substrate
Substrate in an aquarium is a filter as much as a floor. Most of the biology lives in and on it.
Safe
Inert aquarium gravelRinse thoroughly before use. Grain size should be too large to swallow and too small to trap food.
safeFine, smooth sandCorrect for corydoras, kuhli loaches and anything that sifts. Their barbels wear away on sharp gravel.
safeAquasoil for planted tanksExcellent for plants, but it leaches ammonia for the first weeks. Cycle around it; do not stock into it.
safeBare bottomLegitimate for quarantine and grow-out tanks. Easy to clean, but it holds far less biological filtration.
safeWith a caveat
Crushed coral or aragoniteDeliberately raises hardness and pH. Correct for rift-lake cichlids, wrong for soft-water species.
with a caveatVery deep sand bedsAnaerobic pockets form below about 5 cm in still sand. Either keep it shallow or keep it stirred.
with a caveatPainted or coated gravelUsually fine, but coatings chip. Test a handful in a jar for a week first.
with a caveatNever
Sharp or angular gravel with bottom-dwellersWears down barbels and leads to infection in corydoras and loaches.
neverAnything containing metal, limestone of unknown origin, or shells in a soft-water tankSlowly alters chemistry in ways that are hard to diagnose later.
neverThis is our general list for freshwater fish. We have not built one specific to Catfish yet.
My kit says 0.25 ppm. Is that dangerous?
A liquid kit measures total ammonia, but only the un-ionised fraction is really toxic, and that fraction is governed by pH and temperature — each whole pH unit multiplies it roughly tenfold. So the same reading can be nearly harmless in one tank and lethal in another; this works out which one you are in.
Compare with other animals
The same axes for every animal, side by side — the way the guides are written makes that a fair comparison rather than two articles.
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