Altifrons Geophagus Tank Mates
Altifrons Geophagus is semi-aggressive, so its tank mates need choosing with care. Here are the 11 freshwater species that pair well with an altifrons geophagus — plus the 182 to avoid — with a live checker you can tune to your own tank.
The best tank mates for an altifrons geophagus
- Bristlenose Pleco ✅ CompatibleEasy care · Peaceful · 12 cm · 23–30 °C (73–86 °F)Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Rubber Lip Pleco ✅ CompatibleEasy care · Peaceful · 12 cm · 20–26 °C (68–79 °F)Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Marbled Hoplo ✅ CompatibleEasy care · Peaceful · 14 cm · 22–28 °C (72–82 °F)Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Spotted Talking Catfish ✅ CompatibleEasy care · Peaceful · 15 cm · 22–26 °C (72–79 °F)Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Weather Loach ✅ CompatibleEasy care · Peaceful · 25 cm · 5–24 °C (41–75 °F)Compatible on the things that matter: shared water near 24–24 °C, workable temperaments, and no predator-and-prey size gap.
- Medusa Pleco ✅ CompatibleMedium care · Peaceful · 12 cm · 26–30 °C (79–86 °F)Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Spotted Rubbernose Pleco ✅ CompatibleMedium care · Peaceful · 12 cm · 20–26 °C (68–79 °F)Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Banjo Catfish ✅ CompatibleMedium care · Peaceful · 15 cm · 20–26 °C (68–79 °F)Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
- Snowball Pleco ✅ CompatibleMedium care · Peaceful · 16 cm · 24–30 °C (75–86 °F)Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Yellow-spotted Pleco ✅ CompatibleMedium care · Peaceful · 35 cm · 24–27 °C (75–81 °F)Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Elephant-nose Knifefish ✅ CompatibleHard care · Peaceful · 35 cm · 24–29 °C (75–84 °F)Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
Altifrons Geophagus tank mates that can work with care
- Adolf's Cory ⚠️ With cautionMedium care · Peaceful · 5.5 cm · 22–26 °C (72–79 °F)Altifrons Geophagus may bully the smaller Adolf's Cory, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Afra Cichlid ⚠️ With cautionMedium care · Semi-aggressive · 10 cm · 24–28 °C (75–82 °F)pH preferences only just meet (Altifrons Geophagus 5–7.5 vs Afra Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
- Agassiz's Corydoras ⚠️ With cautionEasy care · Peaceful · 6 cm · 22–28 °C (72–82 °F)Altifrons Geophagus may bully the smaller Agassiz's Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Agassiz's Dwarf Cichlid ⚠️ With cautionMedium care · Semi-aggressive · 9 cm · 24–30 °C (75–86 °F)Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Amano Shrimp ⚠️ With cautionEasy care · Peaceful · 5 cm · 18–28 °C (64–82 °F)Adult Amano Shrimp might survive with Altifrons Geophagus, but expect the young to be eaten — plant heavily.
- Angelfish ⚠️ With cautionMedium care · Semi-aggressive · 15 cm · 24–30 °C (75–86 °F)Altifrons Geophagus and Angelfish can both be territorial; doable with space and dense planting, but watch for chasing.
- Angelicus Synodontis ⚠️ With cautionMedium care · Semi-aggressive · 25 cm · 23–27 °C (73–81 °F)Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Assassin Snail ⚠️ With cautionEasy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)Altifrons Geophagus may bully the smaller Assassin Snail, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
+ 139 more “with caution” pairings — see the interactive checker above.
Fish to avoid keeping with an altifrons geophagus
- Wels Catfish ⛔ AvoidHard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)Altifrons Geophagus and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Alligator Gar ⛔ AvoidHard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)Altifrons Geophagus and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Redtail Catfish ⛔ AvoidHard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)Altifrons Geophagus and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Fire Eel ⛔ AvoidMedium care · Semi-aggressive · 100 cm · 24–28 °C (75–82 °F)Fire Eel (100 cm) is big enough to swallow the 25 cm Altifrons Geophagus whole.
- Clown Knifefish ⛔ AvoidHard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)Two assertive fish, one genuinely aggressive: Altifrons Geophagus and Clown Knifefish will hold territory and clash.
- Koi ⛔ AvoidMedium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)Koi (90 cm) is big enough to swallow the 25 cm Altifrons Geophagus whole.
- Spotted Gar ⛔ AvoidHard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)Altifrons Geophagus and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Wolf Cichlid ⛔ AvoidHard care · Aggressive · 72 cm · 24–30 °C (75–86 °F)Two assertive fish, one genuinely aggressive: Altifrons Geophagus and Wolf Cichlid will hold territory and clash.
+ 174 more to avoid — the checker above flags every one.
Check any fish against an altifrons geophagus
Dial in your exact tank size and filter by result — the checker scores every species in our database against an altifrons geophagus, with the reasoning for each verdict.
Will it live with a Altifrons Geophagus?
We compare each fish against your altifrons geophagus on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Banjo Catfish✅ CompatiblePeaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Bristlenose Pleco✅ CompatiblePeaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Elephant-nose Knifefish✅ CompatiblePeaceful · 35 cm · Hard care · 24–29 °C (75–84 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Marbled Hoplo✅ CompatiblePeaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Medusa Pleco✅ CompatiblePeaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Rubber Lip Pleco✅ CompatiblePeaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Snowball Pleco✅ CompatiblePeaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Spotted Rubbernose Pleco✅ CompatiblePeaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Spotted Talking Catfish✅ CompatiblePeaceful · 15 cm · Easy care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Weather Loach✅ CompatiblePeaceful · 25 cm · Easy care · 5–24 °C (41–75 °F)
- Compatible on the things that matter: shared water near 24–24 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Yellow-spotted Pleco✅ CompatiblePeaceful · 35 cm · Medium care · 24–27 °C (75–81 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Angelicus Synodontis⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 23–27 °C (73–81 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Black Collared Catfish⚠️ With cautionSemi-aggressive · 27 cm · Hard care · 23–25 °C (73–77 °F)
- Altifrons Geophagus and Black Collared Catfish can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Clown Loach⚠️ With cautionPeaceful · 30 cm · Medium care · 25–30 °C (77–86 °F)
- Your 378 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Galaxy Pleco⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 22–26 °C (72–79 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Gold Nugget Pleco⚠️ With cautionSemi-aggressive · 28 cm · Hard care · 24–29 °C (75–84 °F)
- Altifrons Geophagus and Gold Nugget Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Honeycomb Pleco⚠️ With cautionSemi-aggressive · 21 cm · Medium care · 24–29 °C (75–84 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Kissing Gourami⚠️ With cautionSemi-aggressive · 30 cm · Medium care · 22–28 °C (72–82 °F)
- Altifrons Geophagus and Kissing Gourami can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Leopard Cactus Pleco⚠️ With cautionSemi-aggressive · 30 cm · Hard care · 24–30 °C (75–86 °F)
- Altifrons Geophagus and Leopard Cactus Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 378 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Mango Pleco⚠️ With cautionSemi-aggressive · 28 cm · Hard care · 25–32 °C (77–90 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Peacock Eel⚠️ With cautionSemi-aggressive · 30 cm · Medium care · 22–28 °C (72–82 °F)
- Altifrons Geophagus and Peacock Eel can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Pearl Cichlid⚠️ With cautionSemi-aggressive · 28 cm · Medium care · 22–28 °C (72–82 °F)
- Altifrons Geophagus and Pearl Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Severum⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 23–30 °C (73–86 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Silver Cichlid⚠️ With cautionSemi-aggressive · 30 cm · Medium care · 24–28 °C (75–82 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Spotted Pleco⚠️ With cautionSemi-aggressive · 30 cm · Easy care · 18–26 °C (64–79 °F)
- Altifrons Geophagus and Spotted Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Spotted Severum⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 26–30 °C (79–86 °F)
- Altifrons Geophagus and Spotted Severum can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Sunshine Pleco⚠️ With cautionSemi-aggressive · 30 cm · Hard care · 23–29 °C (73–84 °F)
- Altifrons Geophagus and Sunshine Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 378 L tank is below the ~473 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Altifrons Geophagus and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (250 vs 25 cm): Alligator Gar will treat Altifrons Geophagus as food.
- Your 378 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Clown Knifefish⛔ Not recommendedAggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Altifrons Geophagus and Clown Knifefish will hold territory and clash.
- Size gap is too large (90 vs 25 cm): Clown Knifefish will treat Altifrons Geophagus as food.
- Your 378 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Fire Eel⛔ Not recommendedSemi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
- Fire Eel (100 cm) is big enough to swallow the 25 cm Altifrons Geophagus whole.
- Altifrons Geophagus and Fire Eel can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 378 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Koi⛔ Not recommendedPeaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
- Koi (90 cm) is big enough to swallow the 25 cm Altifrons Geophagus whole.
- One likes softer water and the other harder (1–8 vs 9–18 dGH) — a compromise, not a perfect match.
- Your 378 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Redtail Catfish⛔ Not recommendedAggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
- Altifrons Geophagus and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Altifrons Geophagus is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
- Your 378 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Spotted Gar⛔ Not recommendedAggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
- Altifrons Geophagus and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (90 vs 25 cm): Spotted Gar will treat Altifrons Geophagus as food.
- Your 378 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Wels Catfish⛔ Not recommendedAggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
- Altifrons Geophagus and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (300 vs 25 cm): Wels Catfish will treat Altifrons Geophagus as food.
- Your 378 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Wolf Cichlid⛔ Not recommendedAggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
- Two assertive fish, one genuinely aggressive: Altifrons Geophagus and Wolf Cichlid will hold territory and clash.
- Altifrons Geophagus is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.
- Your 378 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.
Setting up an altifrons geophagus community tank
Give the group a stable, planted 378 L+ tank with a gentle filter, a reliable heater and plenty of cover — broken sight lines and hiding spots let mid-water and bottom dwellers keep out of each other's way. Cycle it fully and stock gradually.
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How to choose the right tank mates for an altifrons geophagus
Being semi-aggressive, altifrons geophagus can nip or harass smaller, slower or long-finned fish — give it space, broken sight-lines and similarly robust companions. It mostly occupies the bottom of the tank, so it pairs naturally with species that use the other levels.
Altifrons Geophagus grows to about 25 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 13 cm. Match its water, too: aim for 24–28 °C (75–82 °F), pH 5–7.5 and 1–8 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.
Altifrons Geophagus is a shoaling fish — stock a group of 6+ of its own kind first, then build compatible tank mates around them. Whatever you add, introduce new fish slowly, watch for bullying in the first days, and have a backup plan if temperaments clash.
Frequently asked questions
Can an altifrons geophagus live with other fish?
Yes — with the right companions. Our checker finds 11 compatible freshwater species for altifrons geophagus. Pick calm, similarly-sized fish that share its water needs and add them to a mature, well-planted tank.
What is the best tank mate for an altifrons geophagus?
Easy, peaceful, similarly-sized species top the list — for example Bristlenose Pleco, Rubber Lip Pleco, Marbled Hoplo. Use the checker above to match against your own tank size.
What fish should you avoid keeping with an altifrons geophagus?
Avoid Wels Catfish, Alligator Gar, Redtail Catfish and similar — usually a temperature, size or temperament clash. The full "avoid" list below gives the reason for each.
How big a tank do altifrons geophagus tank mates need?
Start from Altifrons Geophagus's own minimum and scale up with every addition. The checker above defaults to a 378 L community tank and flags pairings that need more room — drag the slider to match your setup.