• General Overview

  • Corydoras CW217 is a rare and highly desirable Corydoras species known among collectors for its subtle yet elegant patterning and classic Cory behavior.

  • Identified by its CW number, this species is often sought after by aquarists who appreciate uncommon catfish rather than mass-market varieties.

  • Like other Corydoras, CW217 is a peaceful bottom-dweller that thrives in groups and adds constant gentle movement to the lower levels of the aquarium.

  • Its manageable adult size makes it suitable for small to medium community aquariums when kept under proper conditions.

• Appearance & Identification

  • Compact, rounded body typical of Corydoras species.

  • Features fine patterning and soft contrast rather than bold markings, giving it a refined, natural look.

  • Armored body plates provide protection while maintaining a delicate appearance.

  • Downturned mouth with sensitive barbels designed for sifting through sand in search of food.

  • Coloration becomes clearer and more attractive in well-maintained tanks with darker substrates.

• Temperament & Natural Behavior

  • Extremely peaceful and social, making it ideal for community aquariums.

  • Must be kept in groups of at least 6 individuals, with larger groups encouraging more natural and confident behavior.

  • Very active during the day, often seen schooling along the substrate.

  • Completely non-aggressive toward tank mates, shrimp, and plants.

  • Known for occasional quick dashes to the surface to gulp air—a normal Corydoras behavior.

• Adult Size & Lifespan

  • Adult size: Approximately 4–5 cm

  • Compact size allows compatibility with a wide range of peaceful fish.

  • With proper care, Corydoras CW217 can live 5–8 years or longer.

  • Slow to moderate growth rate.

• Water Conditions (Key to Long-Term Health)

  • Temperature: 22–26 °C

  • pH range: 6.0–7.2

  • Water hardness: Soft to moderately soft (2–10 dGH)

  • Very sensitive to ammonia, nitrite, and poor water quality.

  • Requires a fully cycled, stable aquarium.

  • Weekly water changes of 20–30% are strongly recommended.

  • Gentle filtration with good oxygenation is ideal.

• Tank Setup & Environment

  • Minimum tank size: 60 liters (15 gallons) for a proper group.

  • Substrate: Fine sand is essential to protect barbels and allow natural foraging behavior.

  • Avoid sharp gravel, which can cause barbel erosion and stress.

  • Provide driftwood, leaf litter, smooth stones, and shaded areas.

  • Live plants are highly recommended and appreciated by this species.

  • Moderate lighting helps them feel secure and active.

• Feeding Habit & Diet

  • Omnivorous bottom feeder with a strong preference for sinking foods.

  • Should not be expected to survive on leftovers alone.

  • Recommended diet includes:

    • High-quality sinking Corydoras pellets

    • Micro wafers

    • Frozen or live foods such as bloodworms, daphnia, and brine shrimp

    • Occasional crushed flakes that sink

  • Feed once or twice daily in small portions.

  • Target feeding ensures all individuals receive adequate nutrition.

• Tank Mates & Compatibility

  • Excellent choice for peaceful community aquariums.

  • Ideal tank mates include:

    • Small tetras (neon, ember, cardinal)

    • Rasboras

    • Small gouramis

    • Otocinclus

    • Dwarf shrimp and snails

  • Avoid aggressive, fin-nipping, or very large fish.

  • Safe with shrimp, making it suitable for shrimp-focused planted tanks.

• Breeding Notes (Optional for Advanced Hobbyists)

  • Can be bred in captivity under optimal conditions.

  • Breeding is often triggered by cooler water changes and high-quality live foods.

  • Eggs are typically laid on glass or plant surfaces.

  • Adults do not provide parental care.

• Care Level & Suitability

  • Care level: Easy to intermediate

  • Suitable for beginners with a properly cycled tank and sand substrate.

  • Excellent choice for aquarists who value behavior and harmony over flashy colors.

  • Requires group care and consistent maintenance rather than complex equipment.

• Why Choose Corydoras CW217?

  • Rare and collectible Corydoras species

  • Peaceful and community-safe

  • Active schooling behavior

  • Ideal for planted aquariums

  • Safe with shrimp and small fish

  • Adds life and balance to the bottom level of the tank

The Corydoras CW217 is a refined, rare, and rewarding catfish that brings natural movement and harmony to any well-maintained aquarium. For aquarists seeking something beyond common Cory species, CW217 offers subtle beauty, calm behavior, and long-term enjoyment.