Sterbai Corydoras — Tank Size, Adult Size, Lifespan & Full Care Guide
Corydoras sterbai
Care requirements at a glance
| Scientific name | Corydoras sterbai |
|---|---|
| Group | Catfish |
| Adult size | 2.5 in (6.4 cm) |
| Minimum tank | 20 gallons |
| Temperature | 73-82°F |
| pH | 6-7.6 |
| Hardness | 2-15 dGH |
| Temperament | Peaceful |
| Social | Schooling (keep 6+) |
| Diet | Omnivore |
| Swim level | Bottom |
| Care level | Easy |
| Lifespan | ~10 years |
How big do Sterbai Corydoras get? Adult size explained
Adult sterbai corydoras reach 2.5 inches (6.4 cm). Fish you buy are almost always juveniles at roughly 1.0″, so plan the tank around the adult number, never the size in the bag.
| Stage | Typical length |
|---|---|
| Size sold in stores | about 1.0″ |
| Half-grown | 1.8″ at roughly 5 months |
| Full adult size | 2.5″ (6.4 cm) by 10 months |
Sterbai Corydoras tank size: minimum vs recommended
The 20-gallon figure is a floor, not a target. It assumes a cycled, filtered tank and an owner who does weekly water changes. Sterbai Corydoras need at least 6 individuals, so the real question is not "will one fit" but "will 6 of them fit".
Numbers assume sterbai corydoras are the main occupants with light additional stocking. Use the stocking calculator to model a mixed community.
Sterbai Corydoras group size
Sterbai Corydoras are a shoaling species. In groups below 6 they show measurable stress behaviour: faded colour, hiding and skittishness. Minimum: 6. Better: 8–12. If your budget forces a choice between more species and bigger groups, always choose bigger groups.
Sterbai Corydoras water parameters
| Parameter | Range | Notes |
|---|---|---|
| Temperature | 73–82°F | keep it stable; an adjustable heater is essential — temperature swings cause more disease than a slightly wrong average. |
| pH | 6–7.6 | stability beats the exact number |
| Hardness (GH) | 2–15 dGH | |
| Ammonia (NH₃) | 0 ppm | any reading means the tank is not cycled |
| Nitrite (NO₂) | 0 ppm | any reading is an emergency — water change now |
| Nitrate (NO₃) | under 20–40 ppm | controlled by water changes and live plants |
What do Sterbai Corydoras eat? Diet and feeding
Omnivorous bottom feeders. Sinking wafers, quality pellets and frozen bloodworm or brine shrimp. Do not expect them to survive on leftovers — feed the bottom directly.
The single most common feeding error is quantity, not quality. Feed what disappears in about two minutes, once or twice a day, and the tank stays clean.
How long do Sterbai Corydoras live?
Sterbai Corydoras tank mates: what works and what does not
Compatibility is decided by four things, in this order: water parameters (73–82°F, pH 6–7.6), adult size, temperament, and swimming level.
Good tank mates
Avoid these
Check any pairing in the compatibility tool →
Breeding Sterbai Corydoras
Regularly bred in home aquariums. A cool water change triggers spawning; eggs are laid on glass and plants. Raise fry separately on microworms and crushed flake.
Male vs female sterbai corydoras
Females are larger, deeper-bodied and rounder when viewed from above. Males are smaller and slimmer.
Sterbai Corydoras health, diseases and prevention
Prevention beats treatment every time: quarantine new arrivals for two weeks, keep the tank understocked rather than at maximum capacity, and do a consistent weekly water change.
What does a sterbai corydoras setup cost?
| Item | Typical cost |
|---|---|
| Aquarium, 20 gal | $64 |
| Filter | $25 |
| Heater | $18 |
| Light | $25 |
| Sand substrate & decor | $30 |
| Liquid test kit | $32 |
| 6× sterbai cory | $42 |
| Estimated total | $236 |
Indicative US retail prices for a new setup.
Sterbai Corydoras FAQ
What size tank do sterbai corydoras need?
The minimum tank size for sterbai corydoras is 20 gallons. Because they need a group of at least 6, we recommend 29 gallons or larger for a healthy long-term setup.
How big do sterbai corydoras get?
Adult sterbai corydoras reach 2.5 inches (6.4 cm). Store specimens are usually juveniles at around 1.0 inches, so always plan the tank around the adult size.
How long do sterbai corydoras live?
Sterbai Corydoras typically live about 10 years in a well-maintained aquarium. Stable water quality and a varied diet are the two biggest factors in reaching the upper end of that range.
How many sterbai corydoras should I keep together?
Keep at least 6 together. Groups of 8 to 12 show noticeably better colour and more natural behaviour. Below 6 they become stressed, hide and lose colour.
What water parameters do sterbai corydoras need?
Keep sterbai corydoras at 73–82°F, pH 6–7.6, and hardness 2–15 dGH. Ammonia and nitrite must both read zero at all times.
Are sterbai corydoras good for beginners?
Sterbai Corydoras are rated easy. They are a solid choice for a first community tank as long as the tank is cycled first.
What do sterbai corydoras eat?
Omnivorous bottom feeders. Sinking wafers, quality pellets and frozen bloodworm or brine shrimp. Do not expect them to survive on leftovers — feed the bottom directly.
Do sterbai corydoras need a heater?
Yes. Sterbai Corydoras need 73–82°F, which is above typical room temperature, so an adjustable heater sized to the tank is essential.
What fish can live with sterbai corydoras?
Good tank mates include Neon Tetra, Cardinal Tetra, Ember Tetra, Harlequin Rasbora, Honey Gourami, Pearl Gourami. Match water parameters first, then temperament, then adult size.
What should you not keep with sterbai corydoras?
Avoid Goldfish, Tiger Barb. These are either aggressive towards them, unsafe around them, or need water parameters too far outside 73–82°F and pH 6–7.6.