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Green Gold Corydoras
Corydoras melanotaenia
📍 South America
Corydoras melanotaenia, commonly known as the Green Gold Corydoras, is a small bottom-dwelling catfish prized for its attractive coloration and peaceful demeanor. These hardy scavengers are excellent for community tanks and help maintain substrate cleanliness by foraging along the bottom. They are social fish that thrive in groups and are ideal for beginner to intermediate aquarists.
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Care Guide
Diet
Green Gold Corydoras are omnivorous bottom feeders that consume sinking pellets, algae wafers, and small live foods such as bloodworms and brine shrimp. Feed small amounts once or twice daily, ensuring food reaches the substrate where they forage. They will also consume leftover food and algae, contributing to tank cleanliness.
Behavior
These corydoras are active bottom dwellers that spend most of their time foraging along the substrate using their barbels to search for food. They are social and peaceful, preferring to be kept in groups of at least 4 individuals where they exhibit natural schooling behavior. They are nocturnal to crepuscular and are most active during dawn and dusk hours.
Breeding
Breeding Green Gold Corydoras in captivity is moderately difficult and requires specific conditions including cooler water temperatures (around 20-22°C/68-72°F) and increased feeding with high-quality foods. Males will chase females in a characteristic T-position spawning behavior, and eggs are typically laid on plants or tank surfaces. Fry are small and require infusoria or liquid fry food initially.
Tank Mates
Small, peaceful schooling fish that occupy different water column zones
Similar peaceful bottom-dweller with compatible water parameter requirements
Peaceful mid-water dweller that does not compete for bottom space
Peaceful invertebrate that shares bottom habitat without aggression
Peaceful schooling fish with similar water parameter preferences
Peaceful algae-eating invertebrate compatible with small catfish
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid breathing, lethargy, rubbing against objects
Increase water temperature to 28-30°C (82-86°F), perform water changes, use ich medication containing malachite green or formalin, ensure good aeration
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy
Improve water quality through frequent water changes, reduce ammonia and nitrite, use antibacterial medication, maintain optimal water parameters
Barbel Erosion
Shortened or missing barbels, difficulty foraging, behavioral changes
Improve substrate quality by using smooth sand or fine gravel, maintain excellent water quality, ensure adequate nutrition with varied diet
Columnaris (Flexibacter columnaris)
White or gray film on body, mouth rot, fin deterioration, loss of appetite
Perform large water changes, use antibiotic medications, improve water quality, isolate affected fish if possible, maintain temperature at 24-26°C (75-79°F)
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Quick Facts
- diet
- omnivore - sinking pellets, algae wafers, small live foods
- lifespan
- 3-5 years
- max size
- 4 cm (1.5 in)
- tank size
- 20 gallons minimum
- temperament
- peaceful
Water it likes
- ph
- 6.0-7.5
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 2-12 dGH
- temperature
- 72–82°F (22–28°C)