Identity and search names

Common name
German blue ram
Scientific name
Mikrogeophagus ramirezi
Other names
Ram cichlid, Blue ram
Category
Freshwater fish
Group
Dwarf cichlids
Origin
Warm lowland waters of the Orinoco basin in Venezuela and Colombia
Review outcome
PASSED

Environment and housing

Environment
Freshwater
Care level
Advanced
Adult size
Up to about 4.2 cm standard length, commonly 5–6 cm total length
Expected lifespan
About 2–4 years
Minimum housing
At least 90 L for a compatible pair with several separated territory centres
Temperature
27–30 °C
pH
5.0–7.2
Hardness or minerals
Soft; stable low nitrate and high oxygen availability are critical at warm temperatures
Salinity
Freshwater
Lighting
Subdued to normal lighting with planted shade
Social structure
Keep one compatible pair or a carefully planned group in much larger housing; do not force pair bonds
Placement or swimming zone
Bottom and lower-middle water
Temperament
Usually peaceful outside breeding but territorial around spawning sites
Compatibility
Only with calm warm-water species that do not compete aggressively for food; cool community tanks are unsuitable
Habitat structure
Mature warm aquarium with fine sand, leaf litter, smooth stones, roots, low nitrate, strong oxygenation and gentle flow

Feeding and nutrition

Diet
Small benthic invertebrates, insect larvae, crustaceans and quality fine cichlid foods
Feeding frequency
Offer small varied meals once or twice daily and verify timid fish feed without accumulating waste

Breeding and reproduction

Breeding or reproduction
Open-substrate spawner using stones, leaves or shallow pits; parents usually tend eggs, larvae and fry
Parental care
Biparental care is normal, though stressed or poorly selected domestic pairs may consume broods

System demands

Filtration
Use mature biological filtration sized for the full adult group and feeding load, with intake protection where juveniles, long fins or small fish are present. Provide steady turnover without preventing normal swimming or resting.
Aeration
Maintain strong surface gas exchange and stable dissolved oxygen. Increase aeration during warm weather, medication, transport recovery, breeding crowding or any ammonia or nitrite event.
Maintenance
Test ammonia, nitrite and nitrate, remove waste from feeding and shelter zones, and perform regular temperature- and chemistry-matched water changes before nitrate or dissolved organics accumulate.

Detailed husbandry

Identity scope
This profile applies to Mikrogeophagus ramirezi. Confirm trade identity and preserve breeder, supplier or locality records where relevant.
Adult size and space
Up to about 4.2 cm standard length, commonly 5–6 cm total length. At least 90 L for a compatible pair with several separated territory centres. Plan around adult dimensions, activity, group size, aggression and waste production rather than sale size.
Social structure
Keep one compatible pair or a carefully planned group in much larger housing; do not force pair bonds
Placement or swimming zone
Primary zone: Bottom and lower-middle water. Keep that zone usable for movement, feeding and refuge.
Feeding ecology
Small benthic invertebrates, insect larvae, crustaceans and quality fine cichlid foods
Feeding plan
Offer small varied meals once or twice daily and verify timid fish feed without accumulating waste
Water stability
Maintain 27–30 °C; pH 5.0–7.2; hardness/minerals: Soft; stable low nitrate and high oxygen availability are critical at warm temperatures. Stable oxygenation and nitrogen-cycle control matter more than chasing one exact number.
Adult projected load
Plan capacity for Keep one compatible pair or a carefully planned group in much larger housing; do not force pair bonds at the documented adult size (Up to about 4.2 cm standard length, commonly 5–6 cm total length) in At least 90 L for a compatible pair with several separated territory centres. Include feeding intensity, territorial behaviour and breeding growth rather than counting sale-size juveniles.
Filtration
Use mature biological filtration sized for the full adult group and feeding load, with intake protection where juveniles, long fins or small fish are present. Provide steady turnover without preventing normal swimming or resting.
Aeration
Maintain strong surface gas exchange and stable dissolved oxygen. Increase aeration during warm weather, medication, transport recovery, breeding crowding or any ammonia or nitrite event.
Maintenance
Test ammonia, nitrite and nitrate, remove waste from feeding and shelter zones, and perform regular temperature- and chemistry-matched water changes before nitrate or dissolved organics accumulate.
Habitat structure
Mature warm aquarium with fine sand, leaf litter, smooth stones, roots, low nitrate, strong oxygenation and gentle flow
Compatibility plan
Only with calm warm-water species that do not compete aggressively for food; cool community tanks are unsuitable
Breeding plan
Open-substrate spawner using stones, leaves or shallow pits; parents usually tend eggs, larvae and fry. Parental care: Biparental care is normal, though stressed or poorly selected domestic pairs may consume broods.
Quarantine
Quarantine new fish in a separate cycled aquarium with dedicated equipment. Match temperature and mineral chemistry gradually, confirm feeding and normal respiration, and never add transport water to the established aquarium.
Welfare checks
Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. The main failure is keeping rams too cool or in immature nitrate-prone aquariums. Extreme domestic body forms and weak mass-produced stock also deserve welfare scrutiny.
Biosecurity and release
Never release fish, fry, eggs, aquarium water, sediment, plants or live foods into drains, dams or natural waterways. Confirm current Australian import conditions and South Australian possession, trade and movement rules before acquisition or transfer.
Main risk
The main failure is keeping rams too cool or in immature nitrate-prone aquariums. Extreme domestic body forms and weak mass-produced stock also deserve welfare scrutiny.
Overridable warnings
The main failure is keeping rams too cool or in immature nitrate-prone aquariums. Extreme domestic body forms and weak mass-produced stock also deserve welfare scrutiny. Any override must still preserve adult space, social welfare, stable chemistry, oxygen and filter capacity.

Welfare and risk

Welfare checks
Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. The main failure is keeping rams too cool or in immature nitrate-prone aquariums. Extreme domestic body forms and weak mass-produced stock also deserve welfare scrutiny.
Main warning
The main failure is keeping rams too cool or in immature nitrate-prone aquariums. Extreme domestic body forms and weak mass-produced stock also deserve welfare scrutiny.
Biosecurity
Never release fish, fry, eggs, aquarium water, sediment, plants or live foods into drains, dams or natural waterways. Confirm current Australian import conditions and South Australian possession, trade and movement rules before acquisition or transfer.

Sources

Source note

Current identity or scope, husbandry, system-demand, welfare and Australian biosecurity evidence checked; active retired-source links removed; all AquaNexus wording is original.

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