Description
Metynnis hypsauchen, commonly known as the Striped Silver Dollar or simply Silver Dollar Fish, is a peaceful, laterally compressed freshwater species native to the Amazon and Paraguay river basins. Recognisable by its metallic silver sheen and distinct vertical striping, this shoaling herbivore is prized in large community aquariums for its calm temperament, active schooling behaviour, and striking appearance. Due to its adult size and appetite for plant matter, careful planning of tank size and aquascape is essential.
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Features of a Striped Silver Dollar
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Grows up to 15 cm in length
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Laterally compressed, round body with silvery scales and vertical dark stripes
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Peaceful, social species best kept in groups of 5 or more
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Active swimmer, requires ample space
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Can live up to 10 years in optimal aquarium conditions
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Plant-eater, may nibble soft-leaved plants
The Best Aquarium Size for Striped Silver Dollar
A minimum of 300 litres is required for a small group of Striped Silver Dollars. Due to their adult size, fast movement, and schooling nature, they require substantial open swimming space. Larger tanks (450 litres or more) are strongly recommended for mixed-species communities or larger shoals.
Suitable aquariums to consider include:
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Tank Mate Compatibility for Striped Silver Dollar
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Bala Shark
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Giant Danio
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Clown Loach
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Severum Cichlid
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Bristlenose Pleco
Diet for Striped Silver Dollar
Primarily herbivorous, the Striped Silver Dollar feeds on plant matter in the wild. In captivity, offer a diet rich in vegetable-based flakes, spirulina wafers, blanched spinach, lettuce, zucchini, and peas. Supplement occasionally with protein-rich foods like bloodworms or brine shrimp for balanced nutrition.
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Aquarium Setup Striped Silver Dollar
Aquarium Filtration
High-capacity, efficient filtration is crucial. Use a canister or power filter with strong biological and mechanical capabilities to manage waste and maintain water clarity in larger tanks.
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Aquarium Plants
Avoid delicate or soft-leaved live plants. Use robust species such as Java fern, Anubias, or plastic/silk alternatives. Floating plants can help diffuse light and offer security.
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Aquarium Lighting
Moderate lighting is ideal. Bright lighting should be softened with floating vegetation or overhead shading to reduce stress.
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Aquarium Heating
Keep water temperature between 24–28 °C. Use a submersible heater suitable for large volumes and monitor regularly for consistency.
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Aquarium Substrate
Use smooth gravel or fine sand. Neutral-toned substrates help replicate riverbed environments and reduce glare, promoting natural behaviour.
A variety of Substrates are available at Coburg Aquarium.
Aquarium Decorations
Add large driftwood, sturdy rocks, and open swimming zones. Ensure décor is stable and does not obstruct movement or schooling behaviour.
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