Silver dollar
Metynnis argenteus · Serrasalmidae
Also known as Metynnis
Intermediate
Disc-shaped shoaling herbivore; peaceful with fish but will strip every plant.
In short: A silver dollar needs at least 400 L (106 US gal), water at 24–28 °C (75–82 °F) and pH 5.5–7.5. It is peaceful, best kept in groups of 5 or more, and rated intermediate to keep.
- Minimum tank
- 400 L (106 US gal)
- Temperature
- 24–28 °C (75–82 °F)
- pH
- 5.5–7.5
- Adult size
- 15 cm (5.9 in)
- Group size
- 5+
Care requirements
- Minimum tank volume
- 400 L (106 US gal)
- Temperature
- 24–28 °C (75–82 °F)
- pH
- 5.5–7.5
- Hardness
- 3–15 dGH
- Lifespan
- 8–10 years
- Diet
- Herbivore — vegetable flake, greens, spirulina pellets.
- Care level
- Intermediate
Origin & habitat
- Native region
- Tapajós basin, Brazil
- Water type
- Freshwater
- Biotope
- Vegetated river margins
- Natural conditions
- Warm, soft, slightly acidic flowing water.
Behaviour & stocking
- Temperament
- Peaceful
- Minimum group
- 5 fish
- Swims
- Mid-water
- Good tank mates
- OscarLarge plecosLarger cichlids
- Avoid
- Live plantsNano fish
Breeding & difficulty
- Breeding difficulty
- Advanced
- Sexing
- Males have a longer anal fin and red fin edging.
- Notes
- Egg scatterer in soft warm water; needs a very large tank.
- Common ailments
- IchSpooking injuries in small tanks
Will it fit your tank?
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