Masked Corydoras (Corydoras osteocarus)
A compact, sociable bottom-dweller from the Orinoco basin with a bold dark mask and armoured good looks.
Will it live with a Masked Corydoras?
We compare each fish against your masked corydoras on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Axelrod's Cory✅ CompatiblePeaceful · 5 cm · Easy care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 23–28 °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.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Axelrod's Cory in a shoal of 6+ or it gets stressed and nippy.
- Bandit Corydoras✅ CompatiblePeaceful · 5 cm · Easy 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.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Bandit Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Blue Turbo Snail✅ CompatiblePeaceful · 5 cm · Medium care · 25–30 °C (77–86 °F)
- Compatible on the things that matter: shared water near 25–28 °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.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Checkered Barb✅ CompatiblePeaceful · 5 cm · Easy care · 20–25 °C (68–77 °F)
- Both are peaceful, and their water overlaps around 22–25 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Checkered Barb in a shoal of 6+ or it gets stressed and nippy.
- Cherry Barb✅ CompatiblePeaceful · 5 cm · Easy care · 23–27 °C (73–81 °F)
- Both are peaceful, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Cherry Barb in a shoal of 6+ or it gets stressed and nippy.
- Cochu's Blue Tetra✅ CompatiblePeaceful · 5 cm · Medium care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Cochu's Blue Tetra in a shoal of 8+ or it gets stressed and nippy.
- Firehead Tetra✅ CompatiblePeaceful · 5 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.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Firehead Tetra in a shoal of 8+ or it gets stressed and nippy.
- Five-banded Barb✅ CompatiblePeaceful · 5 cm · Easy care · 23–27 °C (73–81 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Five-banded Barb in a shoal of 6+ or it gets stressed and nippy.
- Forktail Blue-eye✅ CompatiblePeaceful · 5 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Forktail Blue-eye in a shoal of 6+ or it gets stressed and nippy.
- Half-striped Penguin Tetra✅ CompatiblePeaceful · 5 cm · Medium care · 23–28 °C (73–82 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Half-striped Penguin Tetra in a shoal of 6+ or it gets stressed and nippy.
- Harlequin Rasbora✅ CompatiblePeaceful · 5 cm · Easy care · 23–28 °C (73–82 °F)
- Both are peaceful, and their water overlaps around 23–28 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Harlequin Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Honey Gourami✅ CompatiblePeaceful · 5 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Horseman Cory✅ CompatiblePeaceful · 5 cm · Medium care · 22–26 °C (72–79 °F)
- Both are peaceful, and their water overlaps around 22–26 °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 Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Horseman Cory in a shoal of 6+ or it gets stressed and nippy.
- Japanese Trapdoor Snail✅ CompatiblePeaceful · 5 cm · Easy care · 10–28 °C (50–82 °F)
- Both are peaceful; 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.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Julii Corydoras✅ CompatiblePeaceful · 5 cm · Easy care · 23–26 °C (73–79 °F)
- Both are peaceful; 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.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Julii Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Mystery Snail✅ CompatiblePeaceful · 5 cm · Easy care · 20–28 °C (68–82 °F)
- Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Panda Corydoras✅ CompatiblePeaceful · 5 cm · Medium care · 20–26 °C (68–79 °F)
- Both are peaceful, and their water overlaps around 22–26 °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 Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Panda Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Rummy-nose Tetra✅ CompatiblePeaceful · 5 cm · Medium care · 23–29 °C (73–84 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Rummy-nose Tetra in a shoal of 6+ or it gets stressed and nippy.
- Silvertip Tetra✅ CompatibleSemi-aggressive · 5 cm · Easy care · 22–28 °C (72–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Silvertip Tetra in a shoal of 6+ or it gets stressed and nippy.
- Skunk Corydoras✅ CompatiblePeaceful · 5 cm · Easy care · 22–26 °C (72–79 °F)
- Both are peaceful, and their water overlaps around 22–26 °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 Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Skunk Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Spotfin Betta✅ CompatibleSemi-aggressive · 5 cm · Medium care · 23–28 °C (73–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 23–28 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Stoliczka's Barb✅ CompatiblePeaceful · 5 cm · Easy care · 20–26 °C (68–79 °F)
- Both are peaceful, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Stoliczka's Barb in a shoal of 6+ or it gets stressed and nippy.
- Striped Red-Eye Puffer✅ CompatibleAggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
- Peaceful + Aggressive, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Wine Red Betta✅ CompatibleAggressive · 5 cm · Medium care · 24–28 °C (75–82 °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.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- African Butterfly Cichlid⚠️ With cautionSemi-aggressive · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Amano Shrimp⚠️ With cautionPeaceful · 5 cm · Easy care · 18–28 °C (64–82 °F)
- Adult Amano Shrimp might survive with Masked Corydoras, but expect the young to be eaten — plant heavily.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Ash Lipped Apisto⚠️ With cautionSemi-aggressive · 7 cm · Hard care · 24–29 °C (75–84 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Black Ruby Barb⚠️ With cautionSemi-aggressive · 6 cm · Easy care · 22–26 °C (72–79 °F)
- Your 75 L tank is below the ~100 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Black Ruby Barb in a shoal of 6+ or it gets stressed and nippy.
- Bleeding Heart Tetra⚠️ With cautionSemi-aggressive · 7 cm · Medium care · 23–28 °C (73–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Bleeding Heart Tetra in a shoal of 6+ or it gets stressed and nippy.
- Bright Diamond Tetra⚠️ With cautionPeaceful · 7 cm · Hard care · 24–28 °C (75–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Bright Diamond Tetra in a shoal of 8+ or it gets stressed and nippy.
- Buenos Aires Tetra⚠️ With cautionSemi-aggressive · 7 cm · Easy care · 18–26 °C (64–79 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Buenos Aires Tetra in a shoal of 6+ or it gets stressed and nippy.
- Chocolate Gourami⚠️ With cautionPeaceful · 5 cm · Hard care · 25–30 °C (77–86 °F)
- pH preferences only just meet (Masked Corydoras 6.5–7.5 vs Chocolate Gourami 4–6) — target the overlap and acclimate slowly.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Chocolate Gourami in a shoal of 6+ or it gets stressed and nippy.
- Colombian Tetra⚠️ With cautionSemi-aggressive · 6.5 cm · Easy care · 24–28 °C (75–82 °F)
- Your 75 L tank is below the ~114 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Colombian Tetra in a shoal of 6+ or it gets stressed and nippy.
- Dwarf Chain Loach⚠️ With cautionPeaceful · 6 cm · Medium care · 24–29 °C (75–84 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Dwarf Chain Loach in a shoal of 6+ or it gets stressed and nippy.
- Ghost Shrimp⚠️ With cautionPeaceful · 4 cm · Easy care · 18–28 °C (64–82 °F)
- Masked Corydoras may eat Ghost Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Ghost Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Humpbacked Tetra⚠️ With cautionSemi-aggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Humpbacked Tetra in a shoal of 8+ or it gets stressed and nippy.
- Melon Barb⚠️ With cautionPeaceful · 7 cm · Easy care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Melon Barb in a shoal of 8+ or it gets stressed and nippy.
- Morse Code Corydoras⚠️ With cautionPeaceful · 5 cm · Medium care · 23–26 °C (73–79 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Morse Code Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Rounded Filament Barb⚠️ With cautionPeaceful · 7 cm · Medium care · 22–27 °C (72–81 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Rounded Filament Barb in a shoal of 6+ or it gets stressed and nippy.
- Tiger Barb⚠️ With cautionSemi-aggressive · 7 cm · Easy care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~95 L this pairing really wants — crowding raises aggression.
- Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Tiger Barb in a shoal of 6+ or it gets stressed and nippy.
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.
Masked Corydoras care specs
- Care level
- Easy
- Breeding
- Medium
- Max size
- 5 cm (2 in)
- Min tank size
- 60 L (15.9 gal)
- Temperature
- 22–28 °C (72–82 °F)
- pH
- 6.5–7.5
- Hardness
- 2–12 dGH
- Lifespan
- 3–5 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- 6+ (shoaling)
- Family
- Callichthyidae
- Origin
- South America — Orinoco River basin, Venezuela
What is a Masked Corydoras?
The masked corydoras (Corydoras osteocarus) is a compact, armoured catfish native to the Orinoco River basin of Venezuela. It tops out at around 5 cm (2 in) and earns its common name from the striking dark brown to black mask that sweeps across both eyes — one of the more eye-catching markings in a genus of over 170 species. A dark saddle near the dorsal fin completes the pattern on an otherwise tan to olive body.
Like all corydoras, it carries rows of overlapping bony plates (scutes) in place of scales, along with hardened, mildly venomous pectoral-fin spines that make it a resilient and tank-proof fish. Despite that armour, the masked corydoras is entirely peaceful — a sociable schooler that spends its days foraging across the substrate in groups, occasionally surfacing to gulp air when oxygen is low. It is a reliable choice for soft-water South American community tanks and a fine starter catfish for anyone new to the genus.
Where do Masked Corydoras come from?
The masked corydoras originates from the Orinoco River basin in Venezuela, a vast, biologically rich South American river system. Within that drainage it inhabits smaller tributaries and flooded forest margins where the water is warm, soft, slightly acidic and rich in leaf litter and submerged wood. Substrate is typically fine sand or mud, overlaid with decaying leaves that harbour the invertebrates corydoras feed on.
Understanding this origin shapes every decision in care: these fish are adapted to gentle currents, dim or dappled light, soft and slightly acidic water, and a soft substrate. Most aquarium specimens are commercially bred, but their requirements track those of their wild counterparts closely.
What tank size and setup do Masked Corydoras need?
The minimum practical tank for a group of six masked corydoras is 60 litres (16 gallons). Footprint matters more than height — a longer, shallower tank gives more foraging area than a tall narrow one. If you plan to keep a group of eight or more alongside community fish, a 90–120 L (24–32 gal) tank is a more comfortable fit.
Substrate is the single most important setup decision. Use fine-grained sand or very smooth, rounded gravel. Corydoras forage by pushing their sensitive barbels into the substrate; coarse or sharp gravel erodes those barbels over weeks, leading to infection and permanent damage. Fine sand is the safest and most natural choice.
Furnish the tank with driftwood, smooth river stones and dense plant cover or floating plants to create shaded resting areas. Leaf litter (dried Indian almond or oak leaves) mimics the natural environment and provides foraging material. A moderate filter current is welcome — these fish come from flowing water — but avoid a direct blast across the substrate. The tank should be fully cycled and stable before fish are added; masked corydoras are sensitive to ammonia and nitrite.
What water parameters do Masked Corydoras need?
- Temperature: 22–28 °C (72–82 °F) — a heater is required in most climates.
- pH: 6.5–7.5, soft to neutral.
- Hardness: 2–12 dGH.
These figures reflect the fish’s Orinoco lowland origin: soft, slightly acidic water is ideal, though commercially bred specimens tolerate neutral conditions well. The key is stability — gradual, predictable conditions matter more than hitting a precise number. Weekly water changes of 25–30 % are standard practice. Keep nitrate below 20 ppm and do not let the tank sit fouled between changes.
What do Masked Corydoras eat?
Masked corydoras are omnivores that forage continuously along the substrate for invertebrates, plant matter and organic detritus. In the aquarium they accept a wide variety of foods, which makes feeding straightforward:
- Sinking pellets and wafers — a quality bottom-dweller or corydoras-specific pellet should form the nutritional backbone of their diet.
- Frozen or live foods — bloodworms, tubifex, brine shrimp and daphnia are eagerly taken and support condition and colour.
- Blanched vegetables — cucumber, zucchini and spinach are accepted and add variety.
Feed once or twice daily, offering only what the group can consume in a few minutes. Remove uneaten food promptly — rotting food in the substrate degrades water quality quickly. Do not rely on corydoras as “cleanup crew” for other fish’s waste; they are not a substitute for proper maintenance.
How do Masked Corydoras behave — and what fish can live with them?
Masked corydoras are peaceful schooling fish that spend most of their time at the bottom of the tank, foraging with characteristic nose-down “waddling” and occasional bursts of swimming to the surface for air. They are most active in low light — at dawn, dusk and after lights-out. During brighter periods they typically cluster together under cover.
A group of at least six is essential. Fewer than six and the fish become shy, spend more time hiding and show less of the active, social foraging behaviour that makes the species interesting to watch. Larger groups of eight to twelve are livelier still.
They are excellent community fish. Peaceful mid-water and surface species that share their water-parameter requirements make ideal companions: small tetras (cardinal, neon, ember), rasboras, dwarf cichlids and similarly sized peaceful catfish are all compatible. Avoid large, predatory cichlids or any fish large enough to eat a 5 cm catfish. They are also safe with adult dwarf shrimp.
For a full compatibility breakdown, see Masked Corydoras tank mates.
How do you tell male from female Masked Corydoras?
Sexual dimorphism in masked corydoras follows the standard corydoras pattern and is easiest to assess from above. Females are noticeably wider-bodied and marginally longer than males when viewed from above — the broadened abdomen, especially prominent when carrying eggs, is the most reliable indicator. Males are slimmer and slightly smaller. Colour and fin shape do not differ meaningfully between the sexes, so the body-width difference is the practical way to sex adults. Young fish are difficult to sex reliably; wait until they are close to adult size.
How do Masked Corydoras breed?
Masked corydoras breed by the typical corydoras T-position method. Conditioning the group on protein-rich live or frozen foods and then performing a substantial (25–30 %) cooler water change to simulate the start of the rainy season often triggers spawning. The male and female form a distinctive T-shape during which the female collects the male’s sperm in her cupped pelvic fins and simultaneously deposits fertilised eggs onto a cleaned surface — typically plant leaves, the aquarium glass or driftwood.
A single spawning session may produce 20–100 eggs. The parents do not guard the eggs and will eat them given the opportunity, so dedicated breeders move the eggs or the adults after spawning. Eggs hatch in 3–5 days depending on temperature; fry are tiny and need infusoria or commercially prepared fry foods initially, moving on to micro-worms and finely crushed flake as they grow. Raising fry to saleable size takes around three months. We rate overall breeding effort as medium — triggering spawning is achievable, but successfully raising fry requires attention to fry food and water quality.
What diseases affect Masked Corydoras?
The most common health problems in masked corydoras are linked to substrate or water quality:
- Barbel erosion and bacterial infection — the first and most serious risk for corydoras kept on sharp or coarse substrate. Shortened, red-based or frayed barbels indicate damage; the solution is fine sand and improved hygiene.
- Ich (white spot disease) — tiny white cysts across the body and fins. Caused by the parasite Ichthyophthirius multifiliis, usually introduced with new fish or plants. Quarantine all new arrivals for two to four weeks to prevent introduction.
- Red blotch / hemorrhagic septicaemia — red streaking on the body or fins, typically triggered by poor water quality. The primary prevention is maintaining a clean, well-cycled tank and performing regular water changes.
- Fungal infections — fluffy white growths on eggs or on damaged skin, typically secondary to injury or water quality stress.
Prevention across all these conditions is consistent: fine-sand substrate, a fully cycled tank, stable parameters and regular water changes cover the vast majority of health risks.
Health note: medication dosing and disease diagnosis are outside the scope of a care profile. If fish show persistent or worsening symptoms, cross-reference against a reputable veterinary or fish-health source and, where possible, consult an aquatic vet before medicating.
How long do Masked Corydoras live?
Masked corydoras typically live 3–5 years under good aquarium conditions. Consistent water quality, an appropriate fine-sand substrate and a group of at least six appear to be the biggest contributors to a longer lifespan — stressed or solitary corydoras tend to fare worse. Some corydoras species reach 10 or more years in well-managed tanks; the masked corydoras is shorter-lived but a rewarding, active presence for the duration of its lifespan when its modest requirements are met.
Frequently asked questions
How many masked corydoras should I keep together?
At least six — corydoras are true schooling fish and become visibly more active, confident and natural-behaving in groups of six or more. A single cory or a pair will spend most of its time hiding.
Are masked corydoras safe with shrimp?
Yes. They are peaceful bottom-dwellers that ignore adult shrimp entirely. They may occasionally snuffle through shrimp eggs or tiny juveniles while foraging, but they cause no meaningful predation on healthy adult shrimp colonies.
What you need to keep a masked corydoras
The baseline is a heated, filtered 60 L+ tank: a reliable heater to hold 22–28 °C (72–82 °F), a gentle filter that won't batter a masked corydoras in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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