SerrasalmidaeFreshwater Fishintermediate

Silver Dollar 6-pack

Metynnis argenteus

Origin: Amazon basin, South America

S

Water Parameters

Temperature2428 °C
15 °C35 °C
pH6.57.5
49
GH (Hardness)212 °dGH
0 °dGH30 °dGH
KH (Alkalinity)08 °dKH
0 °dKH20 °dKH

Quick Stats

Max Size
15 cm
Min Tank
250 L
Lifespan
10+
Swimming Level
middle
Schooling
Yes (6+)
Diet
herbivore
Temperament
Peaceful; plant destroyer

About

Metynnis argenteus, the Silver Dollar, is a large-bodied, disc-shaped characin from South America that resembles a bright silver coin. Highly active and striking in schools of 6+, they fill a large tank with constant movement and flashing silver reflections. Peaceful with all fish too large to bully; may nip at live plants. Best kept in a well-filtered tank with robust plants (Anubias, Java fern) or artificial plants. Popular in large community tanks alongside arowana, catfish, and cichlids.

Care Guide

Groups of 6+. Large tank 250+ L. Temperature 24–28 °C, soft slightly acidic water. Feed spirulina flakes, blanched vegetables, sinking pellets. Will consume most soft-leaved live plants — use tough species or artificial alternatives.

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