What Size Tank Does a Bolivian Ram Need?
Minimum tank: 20 gallons
A Bolivian Ram (Mikrogeophagus altispinosus) grows to about 3 in (7.6 cm), so the practical minimum is a 20-gallon aquarium. A pair or small group is typical, so leave a little extra room for tankmates.
| Single fish or pair | 20 gallons |
|---|---|
| Comfortable group | 20 gallons |
| Community setup | 30 gallons+ |
Bigger is easier: more water dilutes waste and holds temperature and pH steady. See stocking ideas for a 20-gallon tank or try the stocking calculator.
Frequently asked questions
What is the minimum tank size for a Bolivian Ram?
At least 20 gallons.
Can a Bolivian Ram live in a smaller tank?
Going under 20 gallons stresses the fish, worsens water quality and shortens its life — not recommended.
More on this species: Bolivian Ram full care guide · tank size · temperature · pH & hardness · tank mates