The Altifrons Eartheater is a large, graceful South American cichlid famous for its benthophagous feeding behavior. It constantly takes mouthfuls of sand, sifting it through its gills to extract small food particles. This natural behavior requires a fine sand substrate to prevent gill damage. While generally peaceful and best kept in groups, their constant digging will uproot most planted vegetation.
Altifrons Eartheater At a Glance
Altifrons Eartheater Tank Requirements
Will Altifrons Eartheater fit in your tank?
Care guides tell you what Altifrons Eartheater needs, the next question is whether your tank can safely provide it. Test Altifrons Eartheater against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
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Altifrons Eartheater Water Parameters
Water care products
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Altifrons Eartheater Temperament & Compatibility
Altifrons Eartheater Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard / Adult
The fully grown adult form. Thrives in groups of 4 or more. Requires a minimum 5-foot tank to accommodate their size and active foraging behavior.
Same care requirements as the base species
Also known as: Show Size, Wild Type
Juvenile (Grow-out)
Juveniles are commonly sold around 5-8cm. They grow quickly and will soon require upgrading to their adult tank size. Sand substrate is absolutely mandatory even at this size to establish healthy feeding habits.
Differs in 4 traits from base species
Also known as: Baby, Small Eartheater
Altifrons Eartheater Care Guide Summary
The Altifrons Eartheater, scientifically known as Geophagus altifrons, belongs to the Cichlids - South American family group. Adults reach a maximum size of approximately 25 cm and have a compressed body shape with a moderate growth rate. Classified as mostly peaceful, this species primarily occupies the bottom and mid-level zones of the aquarium and produces a high level of biological waste.
To thrive, the Altifrons Eartheater requires a freshwater only aquarium with a minimum volume of 475 litres and a tank length of at least 150 cm. Water temperature should be maintained between 24°C and 30°C, with a pH range of 5–7.5 and a general hardness of 1–10 dGH. A moderate water flow is preferred.
Due to its specialist needs, the Altifrons Eartheater is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 2 varieties: Standard / Adult and Juvenile (Grow-out). Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Altifrons Eartheater Habitat Setup
When setting up an aquarium for the Altifrons Eartheater, a moderate water flow best suits their natural preferences. Because this species occupies the bottom and mid-level zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour, smooth gravel or rounded substrate to protect their sensitive barbels, and driftwood, which can serve as both a hiding place and a dietary supplement. Keepers should note that expect substrate disturbance, so lightweight décor should be secured and live planted layouts may be difficult to maintain, as this species tends to uproot or consume vegetation.
Altifrons Eartheater Compatibility Notes
Classified as mostly peaceful, the Altifrons Eartheater is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, ornamental shrimp are not safe companions and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the bottom and mid-level zones can help reduce competition and territorial overlap.
Altifrons Eartheater Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Altifrons Eartheater.
Altifrons Eartheater Feeding & Diet Considerations
The Altifrons Eartheater will hunt and eat ornamental shrimp, making it unsuitable for shrimp-focused setups and will eat fry, so breeding efforts in the same tank are unlikely to succeed.
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Frequently Asked Questions About Altifrons Eartheater
How big does Altifrons Eartheater get?
Altifrons Eartheater (Geophagus altifrons) typically reaches a maximum adult size of approximately 25 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Altifrons Eartheater need?
A minimum aquarium volume of 475 litres and a tank length of at least 150 cm are recommended for Altifrons Eartheater. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Altifrons Eartheater need?
Altifrons Eartheater thrives in freshwater only conditions with a temperature range of 24–30°C, a pH between 5 and 7.5, and a general hardness of 1–10 dGH. A moderate water flow is preferred.
Is Altifrons Eartheater peaceful or aggressive?
Altifrons Eartheater is classified as mostly peaceful with an aggression score of 4 out of 10. They are generally well-suited to peaceful community tanks.
Can Altifrons Eartheater live alone?
Yes, Altifrons Eartheater can be kept singly or in a group. They are flexible and adapt well to both setups.
Is Altifrons Eartheater safe with shrimp?
No. Altifrons Eartheater is known to eat ornamental shrimp and is not recommended for shrimp tanks. Even larger shrimp species like Amano Shrimp may be at risk.
Does Altifrons Eartheater have any special tank requirements?
Yes. Altifrons Eartheater benefits from sand (sifters), driftwood (digestion/hiding), and smooth gravel (sensitive barbels) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Top Tank Mates for Altifrons Eartheater
These fish are strong compatibility matches for Altifrons Eartheater based on water preferences, temperament, adult size, and tank behavior.
Celebes Halfbeak
Nomorhamphus liemi
Ideal Tank MatesGold Spot Pleco (L001 / L022)
Pterygoplichthys joselimaianus
Ideal Tank MatesMurray River Rainbowfish
Melanotaenia fluviatilis
Ideal Tank MatesMadagascar Rainbowfish
Bedotia madagascariensis
Ideal Tank MatesMottled Loach
Paracanthocobitis botia
Ideal Tank MatesLong-Finned African Tetra
Brycinus longipinnis
Ideal Tank MatesPlants That Suit Altifrons Eartheater
These plants pair well with Altifrons Eartheater based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Anubias Barteri
Anubias barteri
Belinda's Buce
Bucephalandra belindae
Buce Motleyana
Bucephalandra motleyana
Congo Anubias
Anubias heterophylla
Dwarf Buce
Bucephalandra pygmaea
Fish Similar to Altifrons Eartheater
Jurupari Eartheater
Satanoperca jurupari
The Jurupari Eartheater is a remarkably peaceful South American cichlid famous for its continuous substrate-sifting behavior. They require a fine sand substrate to thrive and prevent damage to their delicate gills. Unlike highly aggressive cichlids, they are gentle giants that prefer the company of their own kind in a large, uncrowded community of similar-sized peaceful fish.
Gymnogeophagus meridionalis
Gymnogeophagus meridionalis
A stunning subtropical 'eartheater' cichlid native to the Uruguay River basin. Unlike typical Amazonian cichlids, they are temperate and benefit from a seasonal winter cooling period. As their name implies, they continuously sift the substrate for benthic invertebrates, making a soft sand substrate an absolute necessity to prevent mouth and gill damage. While generally peaceful for a cichlid, they become fiercely territorial during breeding.
Bahia Red
Geophagus sp. Bahia Red
The Bahia Red is a beautiful, earth-eating cichlid belonging to the Geophagus brasiliensis complex. They are highly sought after for their vivid red/orange hues and pearlescent spangling. Like all 'eartheaters', they require a fine sand substrate to exhibit their natural sifting behaviors. While generally peaceful for a cichlid, they become aggressively territorial during breeding.
Blue Sifter
Cribroheros robertsoni
A stunning Central American cichlid known for its iridescent turquoise speckling and unique earth-eating behavior. It constantly sifts substrate through its gills to forage, making soft sand absolutely mandatory to prevent gill damage. While mildly tempered compared to many Central American cichlids, it becomes highly territorial when breeding.
Cupid Cichlid
Biotodoma cupido
A peaceful, mildly gregarious 'eartheater' cichlid native to the Amazon and Essequibo River basins. Known for the distinctive black teardrop marking behind their gills and subtle, iridescent pastel coloration. Unlike many South American cichlids, they are remarkably gentle and thrive in small shoals. They require excellent water quality and a soft sand substrate to exhibit their natural sifting behavior.
Red Head Tapajos (Geophagus)
Geophagus sp. 'Red Head Tapajos'
A stunning and relatively peaceful South American Eartheater, recently formally described as Geophagus pyrocephalus. They are named for the bright red/orange coloration that develops on the heads of mature adults. As 'eartheaters', they constantly sift substrate through their gills to find food, making fine sand an absolute requirement to prevent injury. They are social cichlids that must be kept in groups.