PisciDex Species Profile
Silver Dollar
Fast schooling characin related to piranhas but mostly herbivorous, needing open swimming space and durable or artificial planting.
Metynnis argenteus
Serrasalmidae | South America | Brazilian river systems including the Tapajós basin
Core Requirements
Tank Size
75 gallons minimum
Adult Size
6 inches
Group Size
Group 6+
Bioload
5/10
Water Parameters
Temperature
75-82 F
pH
5-7
Plant Safe
No
Invert Safe
No
Data Confidence
medium
Temperature note: Recommended and tolerated temperature ranges currently match the primary care profile.
Behavior & Husbandry
Temperament
Peaceful
Aggression
2/10
Diet
Herbivore
Difficulty
Intermediate
Lifespan
10 years
Breeding
Advanced
Schooling
Yes
Compatibility Tags
Large TankPeacefulSchoolingMid WaterSoftwater
Similar Species
Species Compatibility
Database-driven compatibility notes for planning community aquariums.