Red Phantom Tetra Tank Mates

Red Phantom Tetra is peaceful, so its tank mates need choosing with care. Here are the 137 freshwater species that pair well with a red phantom tetra — plus the 82 to avoid — with a live checker you can tune to your own tank.

By The Aquarium DB Team • Updated June 8, 2026 • Full Red Phantom Tetra care guide →
Best matches

The best tank mates for a red phantom tetra

  • Ember Tetra ✅ Compatible
    Easy care · Peaceful · 2 cm · 24–28 °C (75–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Neon Green Rasbora ✅ Compatible
    Easy care · Peaceful · 2 cm · 22–26 °C (72–79 °F)
    Both are peaceful, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Ramshorn Snail ✅ Compatible
    Easy care · Peaceful · 2 cm · 20–28 °C (68–82 °F)
    Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Red Lip Nerite Snail ✅ Compatible
    Easy care · Peaceful · 2 cm · 22–28 °C (72–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Dawn Tetra ✅ Compatible
    Easy care · Peaceful · 2.5 cm · 22–28 °C (72–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Nerite Snail ✅ Compatible
    Easy care · Peaceful · 2.5 cm · 22–28 °C (72–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Assassin Snail ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    Both are peaceful, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Endler's Livebearer ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Glowlight Danio ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    Both are peaceful, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Gold Ring Danio ✅ Compatible
    Easy care · Peaceful · 3 cm · 18–26 °C (64–79 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Malaysian Trumpet Snail ✅ Compatible
    Easy care · Peaceful · 3 cm · 21–27 °C (70–81 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Neon Tetra ✅ Compatible
    Easy care · Peaceful · 3 cm · 20–26 °C (68–79 °F)
    Both are peaceful, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Tail-spot Corydoras ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–28 °C (72–82 °F)
    Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Trinidad Guppy ✅ Compatible
    Easy care · Peaceful · 3 cm · 19–24 °C (66–75 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Pygmy Corydoras ✅ Compatible
    Easy care · Peaceful · 3.2 cm · 22–26 °C (72–79 °F)
    Compatible on the things that matter: shared water near 22–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Glowlight Rasbora ✅ Compatible
    Easy care · Peaceful · 3.5 cm · 23–28 °C (73–82 °F)
    Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Blue Danio ✅ Compatible
    Easy care · Peaceful · 4 cm · 21–26 °C (70–79 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Emperor Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–27 °C (73–81 °F)
    Both are peaceful, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
  • Flame Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Glowlight Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Golden Dwarf Barb ✅ Compatible
    Easy care · Peaceful · 4 cm · 18–24 °C (64–75 °F)
    Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Phoenix Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–28 °C (73–82 °F)
    Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Rosy Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Yellow Phantom Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–27 °C (73–81 °F)
    Both are peaceful, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
With caution

Red Phantom Tetra tank mates that can work with care

  • African Butterfly Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 8 cm · 22–28 °C (72–82 °F)
    African Butterfly Cichlid clearly outsizes Red Phantom Tetra and is semi-aggressive; risky unless the tank is big and well-planted.
  • Agassiz's Dwarf Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 9 cm · 24–30 °C (75–86 °F)
    Agassiz's Dwarf Cichlid clearly outsizes Red Phantom Tetra and is semi-aggressive; risky unless the tank is big and well-planted.
  • Amazon Puffer ⚠️ With caution
    Medium care · Peaceful · 8 cm · 23–28 °C (73–82 °F)
    Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
  • Angelfish ⚠️ With caution
    Medium care · Semi-aggressive · 15 cm · 24–30 °C (75–86 °F)
    Angelfish is semi-aggressive and may chase or nip the smaller Red Phantom Tetra — plant heavily and break up sight lines.
  • Ash Lipped Apisto ⚠️ With caution
    Hard care · Semi-aggressive · 7 cm · 24–29 °C (75–84 °F)
    Ash Lipped Apisto is semi-aggressive and may chase or nip the smaller Red Phantom Tetra — plant heavily and break up sight lines.
  • Auratus Cichlid ⚠️ With caution
    Medium care · Aggressive · 11 cm · 23–28 °C (73–82 °F)
    Different pH ranges (5.5–7.5 vs 7.6–8.8); doable if you sit in the shared band, but not ideal long-term.
  • Badis ⚠️ With caution
    Medium care · Semi-aggressive · 8 cm · 22–28 °C (72–82 °F)
    Badis clearly outsizes Red Phantom Tetra and is semi-aggressive; risky unless the tank is big and well-planted.
  • Banded Dwarf Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 7 cm · 24–30 °C (75–86 °F)
    Expect Banded Dwarf Cichlid to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.

+ 113 more “with caution” pairings — see the interactive checker above.

Avoid

Fish to avoid keeping with a red phantom tetra

  • Wels Catfish ⛔ Avoid
    Hard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)
    Red Phantom Tetra is bite-sized to a 300 cm predatory wels catfish — it will be eaten.
  • Alligator Gar ⛔ Avoid
    Hard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)
    Alligator Gar (250 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.
  • Redtail Catfish ⛔ Avoid
    Hard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)
    Redtail Catfish (120 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.
  • Fire Eel ⛔ Avoid
    Medium care · Semi-aggressive · 100 cm · 24–28 °C (75–82 °F)
    Size gap is too large (100 vs 4 cm): Fire Eel will treat Red Phantom Tetra as food.
  • Clown Knifefish ⛔ Avoid
    Hard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)
    Red Phantom Tetra is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
  • Koi ⛔ Avoid
    Medium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)
    Red Phantom Tetra is bite-sized to a 90 cm koi — it will be eaten.
  • Spotted Gar ⛔ Avoid
    Hard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)
    Spotted Gar (90 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.
  • Wolf Cichlid ⛔ Avoid
    Hard care · Aggressive · 72 cm · 24–30 °C (75–86 °F)
    Wolf Cichlid (72 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.

+ 74 more to avoid — the checker above flags every one.

Interactive tool

Check any fish against a red phantom tetra

Dial in your exact tank size and filter by result — the checker scores every species in our database against a red phantom tetra, with the reasoning for each verdict.

Tank-mate checker

Will it live with a Red Phantom Tetra?

We compare each fish against your red phantom tetra on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.

  • African Dwarf Frog✅ Compatible
    Peaceful · 4 cm · Medium care · 22–26 °C (72–79 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Amapá Tetra✅ Compatible
    Peaceful · 4 cm · Medium care · 24–27 °C (75–81 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Amapá Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Black Phantom Tetra✅ Compatible
    Peaceful · 4.5 cm · Easy care · 22–28 °C (72–82 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Black Phantom Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Blue Danio✅ Compatible
    Peaceful · 4 cm · Easy care · 21–26 °C (70–79 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Blue Danio in a shoal of 6+ or it gets stressed and nippy.
  • Blue Emperor Tetra✅ Compatible
    Peaceful · 4 cm · Medium care · 23–27 °C (73–81 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Blue Emperor Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Cardinal Tetra✅ Compatible
    Peaceful · 4 cm · Medium care · 23–27 °C (73–81 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Cardinal Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Emperor Tetra✅ Compatible
    Peaceful · 4 cm · Easy care · 23–27 °C (73–81 °F)
    • Both are peaceful, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Emperor Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Flame Tetra✅ Compatible
    Peaceful · 4 cm · Easy care · 22–28 °C (72–82 °F)
    • Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Flame Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Glowlight Tetra✅ Compatible
    Peaceful · 4 cm · Easy care · 22–28 °C (72–82 °F)
    • Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Glowlight Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Gold Tetra✅ Compatible
    Peaceful · 4.5 cm · Easy care · 23–28 °C (73–82 °F)
    • Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Gold Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Golden Dwarf Barb✅ Compatible
    Peaceful · 4 cm · Easy care · 18–24 °C (64–75 °F)
    • Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Golden Dwarf Barb in a shoal of 6+ or it gets stressed and nippy.
  • Jelly Bean Tetra✅ Compatible
    Peaceful · 4 cm · Medium care · 20–26 °C (68–79 °F)
    • Both are peaceful, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Jelly Bean Tetra in a shoal of 10+ or it gets stressed and nippy.
  • Marbled Hatchetfish✅ Compatible
    Peaceful · 4 cm · Medium care · 23–28 °C (73–82 °F)
    • Both are peaceful, and their water overlaps around 23–28 °C — no size, zone or temperament conflicts.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Marbled Hatchetfish in a shoal of 6+ or it gets stressed and nippy.
  • Otocinclus✅ Compatible
    Peaceful · 4 cm · Medium care · 21–26 °C (70–79 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Otocinclus in a shoal of 6+ or it gets stressed and nippy.
  • Phoenix Tetra✅ Compatible
    Peaceful · 4 cm · Easy care · 23–28 °C (73–82 °F)
    • Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Phoenix Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Purple Tetra✅ Compatible
    Peaceful · 4 cm · Medium care · 22–26 °C (72–79 °F)
    • Compatible on the things that matter: shared water near 22–26 °C, workable temperaments, and no predator-and-prey size gap.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Purple Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Rainbow Emperor Tetra✅ Compatible
    Semi-aggressive · 3.6 cm · Medium care · 22–28 °C (72–82 °F)
    • Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Rainbow Emperor Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Rosy Tetra✅ Compatible
    Peaceful · 4 cm · Easy care · 22–28 °C (72–82 °F)
    • Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Rosy Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Rummy Nose Rasbora✅ Compatible
    Peaceful · 4 cm · Medium care · 20–26 °C (68–79 °F)
    • Both are peaceful, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Rummy Nose Rasbora in a shoal of 8+ or it gets stressed and nippy.
  • Sparkling Gourami✅ Compatible
    Peaceful · 4 cm · Medium care · 24–28 °C (75–82 °F)
    • Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Strawberry Betta✅ Compatible
    Peaceful · 4 cm · Medium care · 22–27 °C (72–81 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Threadfin Rainbowfish✅ Compatible
    Peaceful · 4 cm · Medium care · 24–28 °C (75–82 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Threadfin Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
  • Tiger Otocinclus✅ Compatible
    Peaceful · 4 cm · Medium care · 22–27 °C (72–81 °F)
    • Both are peaceful, and their water overlaps around 22–27 °C — no size, zone or temperament conflicts.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Tiger Otocinclus in a shoal of 6+ or it gets stressed and nippy.
  • Yellow Phantom Tetra✅ Compatible
    Peaceful · 4 cm · Easy care · 23–27 °C (73–81 °F)
    • Both are peaceful, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Yellow Phantom Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Black Darter Tetra⚠️ With caution
    Semi-aggressive · 4 cm · Hard care · 21–28 °C (70–82 °F)
    • Expect Black Darter Tetra to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Black Ruby Barb⚠️ With caution
    Semi-aggressive · 6 cm · Easy care · 22–26 °C (72–79 °F)
    • Black Ruby Barb and Red Phantom Tetra are close in size, but the semi-aggressive one tends to dominate — add red phantom tetra in a group to spread the pressure.
    • Your 75 L tank is below the ~100 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Black Ruby Barb in a shoal of 6+ or it gets stressed and nippy.
  • Black Skirt Tetra⚠️ With caution
    Semi-aggressive · 6 cm · Easy care · 20–26 °C (68–79 °F)
    • Black Skirt Tetra is semi-aggressive and may chase or nip the smaller Red Phantom Tetra — plant heavily and break up sight lines.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Black Skirt Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Cherry Shrimp⚠️ With caution
    Peaceful · 3 cm · Easy care · 18–28 °C (64–82 °F)
    • Red Phantom Tetra may eat Cherry Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Cherry Shrimp in a shoal of 10+ or it gets stressed and nippy.
  • Desert Goby⚠️ With caution
    Semi-aggressive · 6 cm · Easy care · 18–28 °C (64–82 °F)
    • Expect Desert Goby to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Dwarf Chain Loach⚠️ With caution
    Peaceful · 6 cm · Medium care · 24–29 °C (75–84 °F)
    • Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Dwarf Chain Loach in a shoal of 6+ or it gets stressed and nippy.
  • Ghost Shrimp⚠️ With caution
    Peaceful · 4 cm · Easy care · 18–28 °C (64–82 °F)
    • Red Phantom Tetra may eat Ghost Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Ghost Shrimp in a shoal of 6+ or it gets stressed and nippy.
  • Humpbacked Tetra⚠️ With caution
    Semi-aggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
    • Humpbacked Tetra is semi-aggressive and may chase or nip the smaller Red Phantom Tetra — plant heavily and break up sight lines.
    • Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Humpbacked Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Morse Code Corydoras⚠️ With caution
    Peaceful · 5 cm · Medium care · 23–26 °C (73–79 °F)
    • Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Morse Code Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Serpae Tetra⚠️ With caution
    Semi-aggressive · 4 cm · Easy care · 23–28 °C (73–82 °F)
    • Expect Serpae Tetra to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Serpae Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Silvertip Tetra⚠️ With caution
    Semi-aggressive · 5 cm · Easy care · 22–28 °C (72–82 °F)
    • Expect Silvertip Tetra to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Silvertip Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Spotfin Betta⚠️ With caution
    Semi-aggressive · 5 cm · Medium care · 23–28 °C (73–82 °F)
    • Expect Spotfin Betta to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Striped Red-Eye Puffer⚠️ With caution
    Aggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
    • Expect Striped Red-Eye Puffer to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Tiger Badis⚠️ With caution
    Semi-aggressive · 4 cm · Medium care · 22–24 °C (72–75 °F)
    • Expect Tiger Badis to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Tiger Shrimp⚠️ With caution
    Peaceful · 3 cm · Hard care · 20–25 °C (68–77 °F)
    • Red Phantom Tetra may eat Tiger Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
    • Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
  • Wine Red Betta⚠️ With caution
    Aggressive · 5 cm · Medium care · 24–28 °C (75–82 °F)
    • Wine Red Betta is aggressive and may chase or nip the smaller Red Phantom Tetra — plant heavily and break up sight lines.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Alligator Gar⛔ Not recommended
    Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
    • Alligator Gar (250 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.
    • Expect Alligator Gar to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Your 75 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Clown Knifefish⛔ Not recommended
    Aggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
    • Red Phantom Tetra is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
    • Expect Clown Knifefish to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Your 75 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Fire Eel⛔ Not recommended
    Semi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
    • Size gap is too large (100 vs 4 cm): Fire Eel will treat Red Phantom Tetra as food.
    • Fire Eel clearly outsizes Red Phantom Tetra and is semi-aggressive; risky unless the tank is big and well-planted.
    • Your 75 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Koi⛔ Not recommended
    Peaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
    • Red Phantom Tetra is bite-sized to a 90 cm koi — it will be eaten.
    • Your 75 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Redtail Catfish⛔ Not recommended
    Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
    • Redtail Catfish (120 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.
    • Redtail Catfish is aggressive and may chase or nip the smaller Red Phantom Tetra — plant heavily and break up sight lines.
    • Your 75 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Spotted Gar⛔ Not recommended
    Aggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
    • Spotted Gar (90 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.
    • Spotted Gar is aggressive and may chase or nip the smaller Red Phantom Tetra — plant heavily and break up sight lines.
    • Your 75 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Wels Catfish⛔ Not recommended
    Aggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
    • Red Phantom Tetra is bite-sized to a 300 cm predatory wels catfish — it will be eaten.
    • Expect Wels Catfish to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Your 75 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Wolf Cichlid⛔ Not recommended
    Aggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
    • Wolf Cichlid (72 cm) is big enough to swallow the 4 cm Red Phantom Tetra whole.
    • Expect Wolf Cichlid to harass Red Phantom Tetra at times; give dense cover and watch them at feeding.
    • Your 75 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
    • Keep Red Phantom Tetra in a shoal of 8+ 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 a red phantom tetra community tank

Give the group a stable, planted 75 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

How to choose the right tank mates for a red phantom tetra

As a peaceful species, red phantom tetra is easily bullied — favour other calm, non-nippy fish and steer clear of boisterous or aggressive tank mates. It mostly occupies the middle of the tank, so it pairs naturally with species that use the other levels.

Red Phantom Tetra grows to about 4 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 2 cm. Match its water, too: aim for 22–28 °C (72–82 °F), pH 5.5–7.5 and 2–12 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.

Red Phantom Tetra is a shoaling fish — stock a group of 8+ 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.

FAQ

Frequently asked questions

Can a red phantom tetra live with other fish?

Yes — with the right companions. Our checker finds 137 compatible freshwater species for red phantom tetra. 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 a red phantom tetra?

Easy, peaceful, similarly-sized species top the list — for example Ember Tetra, Neon Green Rasbora, Ramshorn Snail. Use the checker above to match against your own tank size.

What fish should you avoid keeping with a red phantom tetra?

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 red phantom tetra tank mates need?

Start from Red Phantom Tetra's own minimum and scale up with every addition. The checker above defaults to a 75 L community tank and flags pairings that need more room — drag the slider to match your setup.

← Back to the full Red Phantom Tetra care guide