Photo: Wikimedia Commons contributor (CC BY 2.5) — via Wikimedia Commons
Sterbai Corydoras (Corydoras sterbai)
The discus keeper's cory: heat-tolerant to 30 °C, boldly spotted, and endlessly busy across the sand in a tight-knit group.
Will it live with a Sterbai Corydoras?
We compare each fish against your sterbai corydoras on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Agassiz's Corydoras✅ CompatiblePeaceful · 6 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.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Agassiz's Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Banded Dwarf Cichlid✅ CompatibleSemi-aggressive · 7 cm · Medium care · 24–30 °C (75–86 °F)
- Compatible on the things that matter: shared water near 24–30 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Betta✅ CompatibleSemi-aggressive · 6.5 cm · Easy care · 24–28 °C (75–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Black Skirt Tetra✅ CompatibleSemi-aggressive · 6 cm · Easy care · 20–26 °C (68–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Black Skirt Tetra in a shoal of 6+ or it gets stressed and nippy.
- Blackline Rasbora✅ CompatiblePeaceful · 6 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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Blackline Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Blood Red Tiger Pleco✅ CompatiblePeaceful · 6 cm · Medium care · 24–29 °C (75–84 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Butterfly Hillstream Loach✅ CompatiblePeaceful · 6 cm · Hard care · 18–24 °C (64–75 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Celebes Rainbowfish✅ CompatiblePeaceful · 7 cm · Medium care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Celebes Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
- Corydoras Catfish✅ CompatiblePeaceful · 6.5 cm · Easy care · 22–26 °C (72–79 °F)
- Compatible on the things that matter: shared water near 24–26 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Corydoras Catfish in a shoal of 6+ or it gets stressed and nippy.
- Costa's Tetra✅ CompatiblePeaceful · 7 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.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Costa's Tetra in a shoal of 6+ or it gets stressed and nippy.
- Croaking Gourami✅ CompatiblePeaceful · 7 cm · Easy 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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Desert Goby✅ CompatibleSemi-aggressive · 6 cm · Easy care · 18–28 °C (64–82 °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.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Diamond Tetra✅ CompatiblePeaceful · 6 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.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Diamond Tetra in a shoal of 6+ or it gets stressed and nippy.
- Eastern Betta✅ CompatibleSemi-aggressive · 6 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.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Hongsloi Dwarf Cichlid✅ CompatibleSemi-aggressive · 7 cm · Medium care · 24–29 °C (75–84 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 24–29 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Mahachai Betta✅ CompatibleAggressive · 7 cm · Medium care · 24–30 °C (75–86 °F)
- Peaceful + Aggressive, but with no direct clash here, and their water overlaps around 24–30 °C — no size, zone or temperament conflicts.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Peacock Gudgeon✅ CompatiblePeaceful · 7 cm · Medium 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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Peppered Corydoras✅ CompatiblePeaceful · 7 cm · Easy care · 18–26 °C (64–79 °F)
- Both are peaceful, and their water overlaps around 24–26 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Peppered Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Rio Negro Checkerboard Cichlid✅ CompatiblePeaceful · 7 cm · Hard care · 24–29 °C (75–84 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Roundtail Paradise Fish✅ CompatibleSemi-aggressive · 7 cm · Easy care · 10–26 °C (50–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Spotfin Corydoras✅ CompatiblePeaceful · 6.5 cm · Easy care · 22–26 °C (72–79 °F)
- Both are peaceful, and their water overlaps around 24–26 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Spotfin Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Spotted Corydoras✅ CompatiblePeaceful · 7 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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Spotted Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Sumo Loach✅ CompatibleSemi-aggressive · 7 cm · Medium care · 22–26 °C (72–79 °F)
- Compatible on the things that matter: shared water near 24–26 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Umbrella Dwarf Cichlid✅ CompatibleSemi-aggressive · 7 cm · Medium care · 20–26 °C (68–79 °F)
- Compatible on the things that matter: shared water near 24–26 °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 Sterbai 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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Amazon Puffer⚠️ With cautionPeaceful · 8 cm · Medium care · 23–28 °C (73–82 °F)
- Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Amazon Puffer 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 Sterbai 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 Sterbai 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 Sterbai 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 Sterbai 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 Sterbai 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.
- 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 Sterbai 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.
- Congo Tetra⚠️ With cautionPeaceful · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Congo 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 Sterbai 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.
- Glass Catfish⚠️ With cautionPeaceful · 8 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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Glass Catfish in a shoal of 6+ 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 Sterbai 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.
- Pantanal Corydoras⚠️ With cautionPeaceful · 8 cm · Medium care · 22–27 °C (72–81 °F)
- Your 75 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Pantanal 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 Sterbai 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.
- Scissortail Rasbora⚠️ With cautionPeaceful · 8 cm · Easy care · 22–27 °C (72–81 °F)
- Your 75 L tank is below the ~90 L this pairing really wants — crowding raises aggression.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Scissortail Rasbora 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 Sterbai 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.
- Goldfish⛔ Not recommendedPeaceful · 30 cm · Medium care · 18–22 °C (64–72 °F)
- Temperature needs don't overlap (Sterbai Corydoras 24–30 °C vs Goldfish 18–22 °C).
- Goldfish may bully the smaller Sterbai Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 75 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Imperial Flower Loach⛔ Not recommendedSemi-aggressive · 50 cm · Hard care · 15–22 °C (59–72 °F)
- Temperature needs don't overlap (Sterbai Corydoras 24–30 °C vs Imperial Flower Loach 15–22 °C).
- Imperial Flower Loach may bully the smaller Sterbai Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 75 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Panda Loach⛔ Not recommendedPeaceful · 6 cm · Hard care · 18–23 °C (64–73 °F)
- Temperature needs don't overlap (Sterbai Corydoras 24–30 °C vs Panda Loach 18–23 °C).
- Keep Sterbai Corydoras 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.
Sterbai Corydoras care specs
- Care level
- Medium
- Breeding
- Easy
- Max size
- 6.5 cm (2.6 in)
- Min tank size
- 75 L (19.8 gal)
- Temperature
- 24–30 °C (75–86 °F)
- pH
- 6–7.6
- Hardness
- 1–15 dGH
- Lifespan
- 10–15 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- 6+ (shoaling)
- Family
- Callichthyidae
- Origin
- South America — upper Rio Guaporé basin (Bolivia and Brazil)
What is a Sterbai Corydoras?
The Sterbai Corydoras (Corydoras sterbai), or Sterba’s cory, is a small armoured catfish from the Callichthyidae family and one of the most popular corydoras species in the hobby. It earns its place not just through good looks — a dark reticulated body, cream-to-orange spotted fins, and a head dusted in white dots — but through a genuine practical advantage: among roughly 170 corydoras species, the sterbai is one of only a handful that thrive at the elevated temperatures that demanding fish like discus require.
Reaching up to 6.5 cm (2.6 in) at full size, this is a compact fish with big character. A shoal of eight or more crosses the sand in tight formation, pauses to sift the substrate with sensitive barbels, then dashes in unison to the surface to grab a gulp of air — a normal behaviour for all corydoras, which supplement gill breathing with an intestinal air-breathing mechanism. Peaceful toward every tankmate and completely harmless to plants, the sterbai is an excellent community fish for adult fishkeepers willing to give it the group size and substrate quality it needs.
Where do Sterbai Corydoras come from?
Corydoras sterbai is native to South America — specifically the upper Rio Guaporé basin, straddling the border between Bolivia and Brazil. The Guaporé (known as the Iténez on the Bolivian side) is a blackwater-influenced river system draining a broad lowland plain, with warm, soft, moderately acidic water and fine sandy or silty substrates covered in leaf litter and driftwood. Seasonal flooding expands the fish’s range into flooded forest margins, where it forages among decaying leaves and submerged roots.
Understanding this origin shapes every care decision: the sterbai evolved in warm, soft, gently flowing water over a fine substrate. Replicating those conditions — especially the sand bottom and the heat — is the foundation of good care.
What size tank does a Sterbai Corydoras need?
The minimum practical tank size is 75 litres (about 20 gallons), and that is for a group of six. Given that sterbai do best in groups of eight to ten or more, a 100–120 L (26–32 gal) tank is a more realistic target. Floor footprint matters more than height: corydoras are bottom fish, and a tank with a large base gives the shoal more territory to patrol.
A fine sand substrate is non-negotiable. Coarse gravel or sharp-edged substrates abrade the barbels — the whisker-like sensory organs the fish uses to find food — leading to erosion and secondary infection. Pool filter sand or commercially sold aquarium sand works well. Decorate with smooth driftwood, flat stones and leaf litter to create the shaded hiding spots corydoras seek; dense planting is welcome and causes no harm. Leave open sandy areas for the group’s characteristic foraging runs.
What water parameters do Sterbai Corydoras need?
- Temperature: 24–30 °C (75–86 °F). This is the sterbai’s defining advantage — most corydoras cap out around 26 °C, while sterbai are comfortable right up to 30 °C, making them the go-to cory for warm discus or altum angelfish tanks.
- pH: 6.0–7.6. They are adaptable within this band, but softer, slightly acidic water closer to the natural range encourages breeding.
- Hardness: 1–15 dGH — soft to moderately hard.
Stability is paramount. Corydoras barbels and skin are sensitive to sudden parameter swings and to elevated ammonia or nitrite, which appear first as barbel erosion and increased surface-gasping. Run a mature, cycled filter, perform weekly partial water changes of 25–30 %, and keep nitrates below 20 ppm. At the higher temperatures of a discus setup, uneaten food breaks down faster, so vacuuming the sand every water change is especially important.
What do Sterbai Corydoras eat?
Sterbai corydoras are omnivores that in the wild sift through soft substrate for worms, crustaceans, insect larvae, plant detritus and organic particles. In the aquarium, replicate that variety:
- Sinking pellets or wafers (quality catfish or bottom-feeder formula) as the staple.
- Frozen or live foods: bloodworm, daphnia, brine shrimp, and white worms for enrichment and conditioning pre-breeding.
- Blanched vegetables: courgette (zucchini) or cucumber slices occasionally accepted, though animal protein is the priority.
Feed after lights-out or at dusk when the fish are most active, and ensure food reaches the bottom before faster midwater fish consume it. Corydoras will scavenge leftovers, but relying on scraps alone produces underweight, stressed fish. Feed a dedicated portion once or twice daily and remove any uneaten food within an hour to keep the sand clean.
Are Sterbai Corydoras aggressive — and what fish can live with them?
Sterbai corydoras are peaceful and one of the most reliably community-safe fish in freshwater fishkeeping. They ignore tankmates completely, show zero aggression, and do not nip fins. The only caveat is the usual catfish one: they will eat any eggs or small fry they encounter while foraging — not from aggression, but because foraging is what they do.
They pair well with virtually any fish that does not try to eat them. Classic tankmates include discus, angelfish, tetras, rasboras, dwarf cichlids, gouramis and peaceful plecos. Avoid very large cichlids that prey on small fish, or fish with delicate trailing fins if those fish are prone to fin-nipping (though sterbai themselves are not fin-nippers). Dwarf shrimp colonies may be picked off over time as corydoras root through the substrate.
For a complete, filterable list of compatible species and pairings to avoid, see Sterbai Corydoras tank mates.
How do you tell male and female Sterbai Corydoras apart?
Sexing sterbai corydoras is straightforward in a healthy, well-fed group. Females are noticeably rounder and broader-bodied than males, a difference that becomes pronounced when viewed from above and even more obvious when the female is carrying eggs. From the side, a gravid female has a visibly distended belly compared to the slimmer, flatter profile of the male.
Males are more slender throughout and typically slightly smaller overall. In groups of six or more, the difference between the sexes becomes apparent by comparison even when females are not actively carrying eggs. This ease of sexing makes the sterbai a good candidate for planned breeding.
How do Sterbai Corydoras breed?
Sterbai corydoras have a straightforward spawning trigger and are rated easy to breed relative to most freshwater fish. Condition adults on high-quality frozen or live food for several weeks, then perform a large (30–50 %) water change using cooler water — simulating the temperature drop of the Bolivian rainy season. Spawning typically follows within 12–24 hours.
During courtship the male pursues the female, who eventually clasps his pectoral or caudal fin in the classic corydoras “T-position.” She cups a few eggs against her pelvic fins, the male fertilises them, and the pair deposits the adhesive eggs on plant leaves, tank glass or flat hardscape. The process repeats until the female is spent, often producing 50–150 eggs per session.
Eggs are not guarded by either parent and will be eaten by other inhabitants, including the parents themselves. Move eggs to a separate shallow rearing tank or breeding box immediately. Eggs hatch in 3–5 days at 26 °C; fry become free-swimming a few days later and accept microworms and finely powdered food. Raise water quality carefully in the fry tank — young corydoras are sensitive to ammonia.
What are common Sterbai Corydoras diseases?
Corydoras are generally hardy when kept correctly, but a few conditions appear more often than others:
- Barbel erosion / barbel rot: the most common sterbai health problem. Rough substrate, accumulated waste or bacterial infection degrades the barbels, starting as shortening and progressing to full erosion. Prevention is exclusively through fine sand and scrupulously clean substrate — no sharp gravel, no nitrate spikes.
- Red blotch disease (hemorrhagic septicemia): red streaking on the body or fins, often linked to poor water quality or a bacterial pathogen. Robust filtration and regular water changes are the primary prevention.
- Ich (white spot): the ubiquitous white-spot parasite. Sterbai are susceptible, particularly when chilled or stressed. Maintain stable warm water and quarantine all new fish before introduction.
- Fungal infections: most often secondary to physical damage (barbels, skin abrasions). Keep the environment clean to prevent open wounds from becoming entry points.
Health note: the descriptions above are for awareness and prevention. Confirm any diagnosis against a reputable veterinary or fish-health source before treating. Corydoras lack scales on much of their body and are sensitive to certain medications at standard doses — always research species-specific tolerance before medicating.
How long do Sterbai Corydoras live?
A well-kept sterbai corydoras lives 10–15 years — a striking lifespan for a fish under 7 cm long. This is one of the longest-lived small catfish in the hobby, and it reflects how rewarding long-term investment in this species can be. The keys to reaching that upper range are clean sand, stable warm water, a proper-sized group, and a varied diet. Fish kept in gravel tanks with poor water quality or in isolation typically live only a fraction of their potential. Buy a healthy group from a reputable source, set up the tank correctly from the start, and a sterbai shoal can be a fixture of your fishroom for well over a decade.
Frequently asked questions
Can Sterbai corydoras live with discus in a warm tank?
Yes — this is the cory most commonly recommended for discus setups. While most corydoras prefer 22–26 °C, sterbai tolerate and even thrive at 28–30 °C, which is exactly the range discus demand. Keep the substrate scrupulously clean because uneaten food decays fast at high temperatures, and corydoras forage right across the bottom where waste accumulates.
How many Sterbai corydoras should you keep together?
A minimum of six, and more is better. Corydoras are shoaling fish that show their best behaviour — synchronized foraging, playful dashes to the surface for air, natural schooling — only in groups. A single specimen or a trio will be shy and stressed. Eight to ten in a 100 L+ sand-bottom tank is a rewarding sight.
What you need to keep a sterbai corydoras
The baseline is a heated, filtered 75 L+ tank: a reliable heater to hold 24–30 °C (75–86 °F), a gentle filter that won't batter a sterbai corydoras in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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