CheckMyFishTankSilver Dollar care
Metynnis argenteus · Freshwater · Beginner level care
A large flat schooling fish that needs open water.
Feeding
Twice a day. A small pinch of flakes plus fresh vegetables or an algae wafer left in for a few hours. Spirulina flakes, vegetable pellets, blanched greens.
Eats fish small enough to fit in its mouth.
Good tank mates
Fish that pass every check with Silver Dollar in a 250 gallon tank: same water, overlapping temperature, nobody gets eaten and no bullies.
Do not mix with
- Neon Tetra: Silver Dollar grows big enough to eat Neon Tetra.
- Cardinal Tetra: Silver Dollar grows big enough to eat Cardinal Tetra.
- Green Neon Tetra: Silver Dollar grows big enough to eat Green Neon Tetra.
- Black Neon Tetra: Silver Dollar grows big enough to eat Black Neon Tetra.
- Ember Tetra: Silver Dollar grows big enough to eat Ember Tetra.
- Lemon Tetra: Silver Dollar grows big enough to eat Lemon Tetra.
- Glowlight Tetra: Silver Dollar grows big enough to eat Glowlight Tetra.
- Serpae Tetra: Silver Dollar grows big enough to eat Serpae Tetra.
Questions
What size tank does a Silver Dollar need?
At least 125 gallons for a group of 5. Adults grow to about 6 inches, so plan for the adult size, not the size at the store.
What temperature does a Silver Dollar like?
75 to 82 degrees Fahrenheit, with a pH of about 6 to 7. A steady temperature matters more than hitting one exact number.
How many Silver Dollar should I keep together?
Keep 5 or more. They feel safe in a group and show better color and behavior.
What do Silver Dollar eat?
Spirulina flakes, vegetable pellets, blanched greens. Feed twice a day: a small pinch of flakes plus fresh vegetables or an algae wafer left in for a few hours.
Sources
Checked against these sources on 2026-11-10. When sources disagree we use the safer number.