The Red Shoulder Dwarf Cichlid (Apistogramma macmasteri) is a stunning addition to any freshwater aquarium, prized for its vibrant coloration and engaging personality. Males feature fiery red shoulders, a metallic golden body, and flowing fins, while females display subtler hues, often accentuated by a striking black lateral stripe. Native to Colombia, these peaceful dwarf cichlids thrive in well-planted aquariums and exhibit fascinating behaviors, especially during breeding. Perfect for aquarists seeking a manageable, beautiful, and rewarding cichlid species.

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Care Guide:

Scientific Name: Apistogramma macmasteri
Common Name: Red Shoulder Dwarf Cichlid
Family: Cichlidae
Origin: Streams and tributaries in the Orinoco River Basin, Colombia.

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1. Water Parameters:

• Temperature: 72°F to 84°F (22°C to 29°C)
• pH Range: 5.5 to 7.5 (prefers slightly acidic conditions)
• Water Hardness: Soft to moderately hard (2-15 dGH)
• Flow and Filtration: Low to moderate water flow; prefers calm waters with good filtration.

Note: Maintaining stable water parameters is crucial for their health. Regular water changes (20-30% weekly) are recommended.

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2. Tank Setup:

• Minimum Tank Size: 20 gallons for a pair, with larger tanks recommended for multiple pairs or a community setup.
• Substrate: Fine sand or smooth gravel to mimic their natural riverbeds.
• Decor: Include driftwood, leaf litter, caves (e.g., coconut shells or ceramic pots), and smooth stones to create territories and hiding places.
• Plants: Dense planting with species like Amazon Swords, Java Fern, Anubias, or floating plants like Frogbit to provide shade and a sense of security.
• Lighting: Low to moderate lighting to create a subdued environment.

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3. Feeding:

Red Shoulder Dwarf Cichlids are omnivorous with a preference for protein-rich foods.

• Primary Diet: High-quality micropellets or flakes designed for cichlids.
• Supplementary Foods: Live or frozen foods like brine shrimp, daphnia, and blackworms.
• Occasional Treats: Blanched vegetables (e.g., zucchini or spinach) and small insect larvae.
• Feeding Schedule: Feed 1-2 times daily in small amounts to prevent waste and maintain water quality.

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4. Tank Mates:

Red Shoulder Dwarf Cichlids are generally peaceful but can be territorial during breeding.

• Compatible Tank Mates: Small, peaceful fish such as tetras, rasboras, and pencilfish. Bottom-dwellers like Corydoras or Otocinclus also pair well.
• Tank Mate Cautions: Avoid aggressive or overly boisterous species, as well as other cichlids unless the tank is large enough to accommodate multiple territories.

Note: If housing multiple males, ensure the tank is spacious with plenty of visual barriers to prevent aggression.

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5. Behavior and Temperament:

• Activity Level: Active and curious, often exploring the tank and interacting with their environment.
• Social Behavior: Males can be territorial but are generally peaceful. Females are protective, especially during breeding.
• Special Notes: They exhibit fascinating courtship and parenting behaviors, making them a joy to observe.

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6. Breeding:

Breeding Red Shoulder Dwarf Cichlids in captivity is achievable with the right conditions.

• Breeding Setup: Provide a separate breeding tank with soft, acidic water (pH 5.5-6.5) and multiple hiding spots or caves for egg-laying.
• Triggering Breeding: Perform cooler water changes and offer a high-protein diet to simulate the rainy season.
• Parenting: Females guard the eggs and fry, while males defend the territory. Fry become free-swimming within a week and can be fed infusoria or powdered fry food initially, followed by baby brine shrimp.

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Health and Maintenance:

Red Shoulder Dwarf Cichlids are hardy but sensitive to poor water quality.

• Maintenance Tips: Keep the tank clean with regular water changes and monitor parameters closely.
• Common Issues: Stress from inadequate water conditions or aggressive tank mates can lead to illness. Quarantine new arrivals and treat any signs of disease promptly.

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Key Care Tips:

• Maintain soft, slightly acidic water with stable parameters.
• Provide a well-decorated tank with plenty of hiding spots and dense plants.
• Feed a varied diet with high-quality protein sources.
• Observe their social interactions and ensure adequate space for territories.

With their vivid red accents, manageable size, and fascinating behavior, the Red Shoulder Dwarf Cichlid is a rewarding species for both beginner and experienced aquarists. A true jewel of the aquarium world, they bring life and color to any setup!