Care guide · Freshwater · fish

Ram cichlid

Mikrogeophagus ramirezi

Photo: Sven Kullander · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.

The ram cichlid combines blue spangling, dark markings and an expressive dorsal fin in a small cichlid body. Mikrogeophagus ramirezi is often offered beside ordinary community fish, but deserves a more deliberate aquarium plan. This Orinoco-region species needs warm water and is sensitive to unstable conditions. A mature, quiet setup matters more than a newly started tank displaying apparently perfect numbers. Rams search for food near the bottom and may defend a territory during parental care. Two randomly purchased fish do not automatically form a harmonious pair. Choose compatible individuals, provide broken sightlines and retain a way to separate them. The main restriction on tankmates is sustained warm maintenance: a fish that temporarily tolerates the same temperature is not necessarily a suitable permanent companion.

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At a glance

Temperature: 27–30 °C
pH: 5.5–7.0
GH: 1–6 °dGH
Aquarium length: At least 60 cm
Minimum aquarium volume: At least 54 L
Adult size: Approximately 4–5 cm
Group size: 2 individuals
Swimming zone: Bottom
Temperament: Territorial
Lighting preference: Subdued lighting
Cover: Plants and sheltered areas
Staple food: Small granules, Fine flakes
Supplementary food: Live food, Frozen food, Finely crumbled dried natural food

About this species

Adults measure roughly 4–5 cm, depending on sex and the length convention used. The dark flank blotch, eye stripe and blue spangling aid recognition. Do not confuse the species with the usually larger Bolivian ram, which has different care priorities. In ordinary colour forms a pink belly may suggest a female, but juveniles and selected varieties cannot always be sexed reliably this way.

Electric-blue and other colour forms still need warm, clean water. Choose well-built fish with calm breathing, adequate body condition and demonstrated feeding. Attractive colour alone says little about condition after transport or whether two individuals will accept one another as partners.

Natural habitat

The natural range lies in the Orinoco region of Colombia and Venezuela, including the seasonal llanos landscape. Shallow warm waters, quiet margins and cover change with rainfall and flooding. Sand or fine bottom material provides feeding opportunities, while plants, roots and scattered shelter create escape routes. Translate these features into a warm aquarium with open sand and interrupted sightlines, not a bare breeding tank as permanent housing.

Naturally occurring low oxygen or fluctuating conditions are not aquarium targets. Gas exchange remains especially important at higher temperatures. Stable maintenance values are used here without implying that every wild population and captive strain requires exactly the same water recipe.

Aquarium and layout

Specialist sources cite 60 × 30 × 30 cm, around 54 litres gross, as a lower limit for a compatible pair. Prefer at least 80 cm and around 100 litres or more: extra floor area helps retreat and territory formation. Companions require further space; the smaller setup is not a community recommendation. Provide fine sand, low visual barriers, wood and a few flat stones.

Keep feeding patches accessible and avoid forceful bottom currents. Mature biological filtration and stable heating are essential. Even a larger aquarium needs a separation option for a repeatedly harassed fish; litres do not repair an incompatible pairing.

Water conditions

Choose 27–30 °C, pH 5.5–7 and approximately 1–6 °dGH. This is appreciably warmer than routine neon tetra maintenance. Some sources give lower temperature limits, but these are not used to justify permanent cool community housing. No unsupported separate KH target is added.

Very soft water requires careful pH stability rather than abrupt correction. Ammonia and nitrite should be undetectable. Make regular matched partial changes and limit accumulating waste. At these temperatures, support oxygen exchange without subjecting the fish to a strong current.

Behaviour and group size

An established pair may cooperate but becomes territorial around eggs or fry. Simply having two individuals does not demonstrate a pair bond. Watch for a fish trapped in a corner, excluded from feeding or denied resting cover. Other bottom dwellers may repeatedly enter the defended area.

Tiny shrimps and fry can be eaten. Plants are not normally destroyed as food, although bottom disturbance may affect loose cuttings. Assess every pairing through warmth, floor area, feeding competition and breeding behaviour. Cards concern separate combinations, not a proposal to add every listed species to the pair.

Feeding

Rams take many small animal food items near the substrate. Use a complete fine food that sinks sufficiently and is demonstrably accepted. Newly acquired fish may hesitate over dry food; check their actual intake rather than merely whether food disappears. Small live or thawed prey provide useful variety.

Dried Daphnia is only supplementary and may need soaking to reach the feeding area. Divide small daily rations among quiet locations. Oversized particles, fast companions and food remaining at the surface can cause shortages even when a product appears suitable in principle.

Breeding

A compatible pair may lay eggs on a stone or other flat surface. Both parents can tend eggs and fry, increasing territorial pressure on neighbours. Inexperienced or disturbed parents may lose or eat a clutch; this is not an automatic reason for medication. A separate quiet breeding aquarium is safer than a busy community.

After using their yolk, fry require suitably tiny live food, such as appropriate Artemia nauplii. Prepare food and space beforehand and maintain warm, stable water quality. Repeatedly moving parents or broods to force a result is counterproductive.