Mikrogeophagus ramirezi
Centrepiece dwarf cichlid for a planted Amazon-style scape. Demands warm, clean, soft water; sensitive to nitrate. A flat stone makes a perfect spawning site.
German Blue Ram (Mikrogeophagus ramirezi) reaches 5–7 cm as an adult and needs a minimum tank of 75 L (pair). Native to Orinoco basin, Venezuela & Colombia, it lives in the mid to bottom water column with a peaceful (territorial when breeding) temperament. Aim for 26–30 °C, pH 5.0–7.0, and 1–8 dGH hardness. Lifespan is 2–3 years with good care. Keep german blue ram in groups of 2+, pair schoolers need numbers to display natural behaviour. Diet: omnivore, Quality flake, micro pellets, frozen brine shrimp, bloodworms. Plant-safe: Yes. Shrimp-safe: Risky with dwarf shrimp.
Care at a glance
Centrepiece dwarf cichlid for a planted Amazon-style scape. Demands warm, clean, soft water; sensitive to nitrate. A flat stone makes a perfect spawning site.
By Mike ElmiraUpdated 2 min read
Part of our complete guide to aquarium fish for the planted tank.
The parameters that decide whether german blue ram fits in your tank.
Mid to Bottom
No
Keep as a bonded pair
Cichlidae
Omnivore
Quality flake, micro pellets, frozen brine shrimp, bloodworms.
2–3 yrs
Medium
Warm shallow llanos pools of the Orinoco basin
Orinoco basin, Venezuela & Colombia
Tank-mate safety and the species this one is documented to thrive (or fail) alongside.
Cardinal tetras, rummynose tetras, corydoras (sterbai for the heat), hatchetfish, otocinclus. Best in a soft-water Amazon biotope.
Other cichlids (territorial conflicts), boisterous fish, anything that nips fins during breeding.
Hard-won lessons from the tank.
Keep tank temp at 28–29 °C — this is non-negotiable for long-term health. Buy young juveniles (~2 cm) and let a pair form naturally; bonded pairs are far more stable than randomly paired adults. Watch for the 'shimmy' (rapid side-to-side motion) — it signals stress, usually parameter or nitrate issues.
'Mikrogeophagus' = 'small earth-eater'. Species 'ramirezi' honours the collector Manuel Ramírez. 'German Blue' refers to a specific blue colour line bred in Germany.
What can go wrong and how to spot it.
Failure modes, in order of how dramatic the fix is.
Sensitive to nitrate (>20 ppm), temperature swings, and stress. Susceptible to a wasting condition often called 'ram disease' that's likely a complex of stressors plus pathogens.
NOT a beginner cichlid despite small size. They demand water quality, warmth, and stability that catches new keepers out. The 'community cichlid' label undersells how demanding they are.
The practical routine, read top to bottom.
75 L+ per pair, larger for community. Sand substrate, flat stones, driftwood, dense plants. Warm (28–30 °C), soft (<8 dGH), slightly acidic (pH 5.5–7.0). Excellent filtration with low flow.
4 weeks. Watch for slow-onset wasting that can take weeks to appear.
Where it comes from, how it behaves, and the variants you'll see at retail.
Where it lived before it came home.
Orinoco basin floodplains in Venezuela and Colombia. Warm (27–32 °C in dry season), soft, acidic, slow-moving water with sandy substrate and dense submerged structure.
Insect larvae, small crustaceans, plant matter, biofilm.
Wild populations not threatened; aquarium stock entirely farmed.
How they pair, reproduce, and grow.
Males have first ray of dorsal fin elongated and pointed. Females have a pink/purple flush on belly, especially when in spawning condition. Black flank spot has metallic scales in males, plain in females.
Substrate spawners on flat stones or broad leaves. Both parents tend eggs and fry. Soft acidic water, 28–30 °C, very stable conditions. Fry are tiny; first food microworms and powder fry food. Pair-bonded — they need to choose each other; buy 6 juveniles and let them pair off.
The named cultivars and the lookalikes worth flagging.
Wild German Blue, Electric Blue Ram, Gold Ram, Long-fin variants, Balloon Ram (avoid — deformed body shape). Quality varies hugely; mass-farmed Asian rams are often weak.
Direct answers to the questions search engines and AI assistants surface most often about this species.
German Blue Ram (Mikrogeophagus ramirezi) needs a minimum tank of 75 L (pair). They live in the mid to bottom water column and should be kept in groups of 2+, so a longer footprint matters more than depth.
Target 26–30 °C, pH 5.0–7.0, and 1–8 dGH hardness. Acclimate slowly when moving them between water sources.
Shrimp safety: Risky with dwarf shrimp. Plant safety: Yes.
German Blue Ram are omnivore. Quality flake, micro pellets, frozen brine shrimp, bloodworms.
On Fin & Stem's 1–5 difficulty scale this species rates 4/5. Advanced, demands dialled-in CO₂/dosing or precise water chemistry. Breeding difficulty: medium.
Typical lifespan in a well-maintained tank is 2–3 years.
A planted tank is a system. Pair this fish with one entry from each other pillar to plan the whole scape.
