Description
The Dark Knight Ram is a selectively bred, jet-black variant of Mikrogeophagus ramirezi, a small, strikingly coloured American cichlid native to the Orinoco River basin in South America. Known for their peaceful temperament, the Dark Knight Ram has gained popularity for its unique velvet-black coloration and suitability for community aquaria. While relatively delicate compared to hardier cichlid species, it thrives in stable, soft, and warm freshwater environments with gentle tank mates.
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Features of a Ram – Dark Knight
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Grows up to 5–6 cm in length
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Completely black or deep indigo body, including fins
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Peaceful, social, and pair-bonding behavior
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Lifespan of 2–3 years with optimal care
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Males often slightly larger with more extended dorsal rays
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Best kept singly, in bonded pairs, or in peaceful community setups
The Best Aquarium Size for Ram – Dark Knight
A single Dark Knight Ram or a bonded pair requires a minimum of 60 litres. For a community setup with compatible species, tanks 90 litres or larger are recommended to ensure space and reduce territorial tension.
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Tank Mate Compatibility for Ram – Dark Knight
Choose non-aggressive, similarly sized species that tolerate warm, soft water. Ideal tank mates include:
Avoid large, fast, or fin-nipping fish that may stress or outcompete the ram.
Diet for Ram – Dark Knight
A high-protein, varied diet supports colouration and health. Feed:
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High-quality micro pellets formulated for dwarf cichlids
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Frozen or live foods such as bloodworms and brine shrimp
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Occasional blanched vegetables or spirulina-based flakes
Feed small amounts 1–2 times daily, removing any uneaten food.
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Aquarium Setup for Ram – Dark Knight
Aquarium Filtration
Use a sponge or internal filter with gentle flow. Dark Knight Rams dislike strong currents. Maintain excellent water quality with biological filtration.
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Aquarium Plants
Heavily plant the tank with species such as Java Fern, Anubias, and Amazon Swords. Plants provide cover and help reduce stress.
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Aquarium Lighting
Moderate lighting enhances their velvet-black appearance without causing stress. Avoid harsh or overly bright lighting.
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Aquarium Heating
Maintain a stable water temperature of 26–30°C with a reliable heater. Sudden changes may cause illness.
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Aquarium Substrate
Use fine sand or smooth gravel to allow natural foraging behavior. Dark substrate helps enhance their colour.
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Aquarium Decorations
Incorporate driftwood, small caves, and leaf litter to mimic their natural environment and provide secure hiding places.
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