Bolivian Ram

Mikrogeophagus altispinosus

Bolivian Ram (Mikrogeophagus altispinosus) — Varies care, Peaceful, under Other. Minimum tank in the app: 45 US gal min; aim for 75–82°F and pH 6.5–7.5. The Bolivian Ram is a captivating choice for aquarists seeking a vibrant, mid-water fish with a blend of personality and charm.

Bolivian Ram (Mikrogeophagus altispinosus) in a planted freshwater aquarium
Care levelVaries
TemperamentPeaceful
Min tank size45 US gal min
pH range6.5–7.5
Temperature75–82°F
Max size3.1 in (8.0 cm)
Captive lifespan5–10 years
SchoolingNo

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

South America

  • South America

Regional colours match the stocking calculator’s origin map.

Bolivian Ram Tank Setup

Create a balanced environment with ample hiding spots using plants, driftwood, and rocks to promote security while allowing open swimming areas. Maintain moderate water flow and opt for a substrate that mimics their natural habitat—fine gravel or sand is ideal. Lighting should be soft to enhance their colours while avoiding stress.

What Do Bolivian Rams Eat?

Bolivian Rams are opportunistic feeders that may compete for food, so it's essential to implement varied feeding strategies. They may require smaller, frequent meals to ensure all individuals have access, boosting their health and enhancing their coloration.

Bolivian Ram Tank Mates

Ideal tank mates include similarly sized, semi-aggressive species that occupy different swim zones, such as certain tetras or dwarf cichlids. Avoid overly aggressive or large fish that may intimidate them; intraspecies interactions can lead to conflict, especially if multiple males are present without sufficient territory.

Are Bolivian Rams Good for Beginners?

Care demand varies with setup and individual fish; use the numbers above as your baseline. Aquarists often underestimate the need for territorial space, leading to stress and aggression. Overcrowding or mixing with incompatible species can disrupt the social dynamics and result in health issues.

Building a community? Run the full list through the stocking calculator before you add anything else.

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