San juan cory
Minimum Tank Volume 10 Gallon |
Recommended Tank Volume 15.1 Gallon (for groups of 5 or more) |
Maximum Adult Length 2 inch |
Average Adult Length 1.8 inch |
Shoaling (6+ required) Yes |
Preferred Water Type Freshwater, soft to medium hardness, slightly acidic to neutral pH |
Minimum Group Size 5 |
Temperature Range (°C) 22–28 |
pH Range 6.0–7.7 |
Water Hardness (dGH) 4–19 |
Typical Lifespan (years) 3 years |
Minimum Tank Volume 10 Gallon | Recommended Tank Volume 15.1 Gallon (for groups of 5 or more) |
Maximum Adult Length 2 inch | Average Adult Length 1.8 inch |
Shoaling (6+ required) Yes | Preferred Water Type Freshwater, soft to medium hardness, slightly acidic to neutral pH |
Minimum Group Size 5 | Temperature Range (°C) 22–28 |
pH Range 6.0–7.7 | Water Hardness (dGH) 4–19 |
Typical Lifespan (years) 3 years |
Introduction
The San Juan Cory (Corydoras bilineatus) is a charming freshwater catfish cherished by aquarists for its peaceful nature and striking appearance. With its distinctive black body adorned with white or silver markings forming two horizontal stripes, this species adds visual interest to any aquarium. Ideal for both novice and intermediate fishkeepers, the San Juan Cory is relatively easy to care for, provided its specific needs are met.
What makes the San Juan Cory a popular choice among aquarists?
Its peaceful temperament, unique coloration, and active bottom-dwelling behavior make it a delightful addition to community tanks.
Is the San Juan Cory suitable for beginners?
Yes, with proper care and attention to its environmental needs, it is well-suited for beginner aquarists.
Care and Environment
Providing optimal care for the San Juan Cory involves attention to tank size, water parameters, diet, and habitat setup.
What is the minimum tank size for a San Juan Cory?
A minimum tank size of 38 liters is recommended to accommodate a small group, as these fish thrive in social settings.
What are the ideal water parameters for this species?
Maintain a temperature between 22°C and 28°C, a pH range of 6.0 to 7.7, and water hardness between 4 to 19 dGH. Consistent water quality is crucial for their health.
Filtration should be efficient to keep the water clean, but avoid strong currents, as San Juan Corys prefer gentle water flow. Standard aquarium lighting is sufficient, as they do not have specific lighting requirements.
As omnivores, they accept a variety of foods, including high-quality flake foods, sinking pellets, algae wafers, and live or frozen foods like bloodworms and brine shrimp. Feeding should be done once or twice daily, offering only what they can consume in a few minutes to prevent overfeeding.
For substrate, use sand or fine gravel to protect their sensitive barbels. Incorporate live plants and driftwood to mimic their natural habitat and provide hiding spots. Ensure the tank has open areas for foraging and shaded regions for rest.
Are there any specific challenges in keeping San Juan Corys?
They are sensitive to poor water quality and should not be exposed to salt, as it can harm them. Regular water changes and monitoring are essential to maintain optimal conditions.
Origin and Habitat
Native to the Madeira River basin in Bolivia, the San Juan Cory inhabits freshwater environments characterized by slow-moving, clear waters with sandy or detritus-rich substrates. These areas often have dense vegetation along the shores, providing ample cover and foraging opportunities. Seasonal variations can affect water levels and flow, influencing their natural behaviors.
What type of environment does the San Juan Cory prefer?
They thrive in slow-moving, clear waters with sandy bottoms and abundant plant life, which offer both food sources and shelter.
How do seasonal changes affect their natural habitat?
Seasonal fluctuations can alter water levels and flow rates, impacting their feeding and breeding behaviors.
Temperament and Compatibility
The San Juan Cory is a peaceful, social species that thrives in groups of five or more. They exhibit shoaling behavior, often seen foraging together along the tank bottom. Their non-aggressive nature makes them excellent candidates for community aquariums.
What are suitable tank mates for the San Juan Cory?
Compatible companions include small, peaceful fish such as tetras, guppies, and dwarf gouramis. Avoid housing them with aggressive or large predatory species that may pose a threat.
How can I create a harmonious tank environment for them?
Maintain a group of at least five San Juan Corys, provide ample hiding spots, and ensure tank mates share similar temperaments and environmental requirements.
Interesting Facts
The San Juan Cory is known for its unique "blinking" behavior, where it can tilt its eyes downward to examine the substrate, giving the appearance of blinking. This endearing trait adds to their appeal among aquarists.
Do San Juan Corys have any special adaptations?
Yes, they possess sharp spines on their pectoral and dorsal fins, which serve as a defense mechanism against predators. Additionally, they can gulp air from the surface, allowing them to survive in low-oxygen environments.
Is breeding San Juan Corys in captivity common?
Breeding in home aquariums is rare but possible. Conditioning with high-protein foods and simulating environmental triggers, such as cooler water changes, can encourage spawning behaviors.
Sources
All information in this article has been gathered from the following reputable sources: