Sand’s Corydoras - Corydoras davidsandsi

Scientific name: Corydoras davidsandsi

Common name: Sand’s Corydoras

Family: Callichthyidae

Usual size in fish tanks: 5 - 6 cm (1.97 - 2.36 inch)

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Recommended pH range for the species: 5 - 7

Recommended water hardness (dGH): 4 - 18°N (71.43 - 321.43ppm)

0°C 32°F30°C 86°F

Recommended temperature: 20 - 28 °C (68 - 82.4°F)

The way how these fish reproduce: Spawning

Where the species comes from: South America

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Bottom levels

Origin

Sand’s corydoras (Corydoras davidsandsi) originates from South America, specifically from the tributaries of the Amazon basin in Brazil. These fish are typically found in slow-moving streams and rivers with soft, sandy bottoms and dense vegetation.

Short description

Corydoras davidsandsi is a peaceful bottom-dwelling catfish that resembles the popular panda cory but grows slightly larger, reaching up to 6 cm (2.4 inches). Its body is off-white with distinctive black markings around the head and along the dorsal region. Like other Corydoras, it is armored with small bony plates and possesses a modified intestine that allows it to gulp atmospheric air from the surface. These social fish thrive in groups and are a great addition to community aquariums with other peaceful species. They are active, amusing to watch, and help keep the substrate clean by sifting through it.

Lifespan

With proper care, Sand’s corydoras typically lives between 3 and 5 years, though some individuals may live longer under optimal conditions.

General care

Sand’s corydoras should be kept in groups of at least 5 individuals. A tank of 90 cm (36 inches) in length is the minimum recommended to provide ample swimming space. Use soft, sandy substrate to protect their delicate barbels, and maintain stable water conditions with temperatures between 20–28 °C (68–82.4 °F), a pH of 5.0–7.0, and moderate hardness. Avoid sharp decorations and rough substrates.

Install a reliable filtration system and perform regular water changes to maintain excellent water quality. Be cautious when handling these fish, as they have sharp pectoral fin spines that can cause minor injuries or get caught in nets.

Feeding

These omnivorous catfish accept a wide variety of foods. Offer a staple of sinking pellets or wafers, and supplement their diet with live or frozen treats such as bloodworms, daphnia, or brine shrimp. Blanched vegetables like zucchini or peas can be provided occasionally. Feed once or twice daily, and remove any uneaten food to maintain water quality.

Sexing

Females are generally larger and rounder-bodied than males, especially when viewed from above. Males tend to be slimmer and may appear slightly more active during spawning behavior.

Breeding

Breeding Corydoras davidsandsi is similar to breeding other Corydoras species. Set up a separate tank with soft, slightly acidic water and an air-driven sponge filter. Add spawning mops or fine-leaved plants, and use a ratio of two males per female. Condition the adults with protein-rich live or frozen foods until females become visibly gravid.

A large water change using slightly cooler water can trigger spawning. Eggs are scattered across the tank, including on the glass and plants. After spawning, remove the adults to prevent egg predation. Eggs hatch in 3–4 days, and fry become free-swimming after a few more days. Start feeding with newly hatched brine shrimp or commercial fry food, and perform gentle daily water changes to ensure survival.