Flowerhorn Cichlid Tank Mates

Flowerhorn Cichlid is aggressive, so its tank mates need choosing with care. Here are the 5 freshwater species that pair well with a flowerhorn cichlid — plus the 280 to avoid — with a live checker you can tune to your own tank.

By The Aquarium DB Team • Updated June 7, 2026 • Full Flowerhorn Cichlid care guide →
Best matches

The best tank mates for a flowerhorn cichlid

  • Marbled Hoplo ✅ Compatible
    Easy care · Peaceful · 14 cm · 22–28 °C (72–82 °F)
    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 ✅ Compatible
    Easy care · Peaceful · 15 cm · 22–26 °C (72–79 °F)
    Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–26 °C — no size, zone or temperament conflicts.
  • Snowball Pleco ✅ Compatible
    Medium care · Peaceful · 16 cm · 24–30 °C (75–86 °F)
    Compatible on the things that matter: shared water near 25–30 °C, workable temperaments, and no predator-and-prey size gap.
  • Yellow-spotted Pleco ✅ Compatible
    Medium care · Peaceful · 35 cm · 24–27 °C (75–81 °F)
    Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–27 °C — no size, zone or temperament conflicts.
  • Elephant-nose Knifefish ✅ Compatible
    Hard care · Peaceful · 35 cm · 24–29 °C (75–84 °F)
    Compatible on the things that matter: shared water near 25–29 °C, workable temperaments, and no predator-and-prey size gap.
With caution

Flowerhorn Cichlid tank mates that can work with care

  • Adolf's Cory ⚠️ With caution
    Medium care · Peaceful · 5.5 cm · 22–26 °C (72–79 °F)
    Flowerhorn Cichlid may bully the smaller Adolf's Cory, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Agassiz's Corydoras ⚠️ With caution
    Easy care · Peaceful · 6 cm · 22–28 °C (72–82 °F)
    Flowerhorn Cichlid may bully the smaller Agassiz's Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Assassin Snail ⚠️ With caution
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    Flowerhorn Cichlid may bully the smaller Assassin Snail, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Axelrod's Cory ⚠️ With caution
    Easy care · Peaceful · 5 cm · 23–28 °C (73–82 °F)
    Flowerhorn Cichlid may bully the smaller Axelrod's Cory, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Bandit Corydoras ⚠️ With caution
    Easy care · Peaceful · 5 cm · 22–27 °C (72–81 °F)
    Flowerhorn Cichlid may bully the smaller Bandit Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Banjo Catfish ⚠️ With caution
    Medium care · Peaceful · 15 cm · 20–26 °C (68–79 °F)
    Flowerhorn Cichlid may hunt Banjo Catfish, fry or shrimplets — safest in a heavily planted tank.
  • Black Doras Catfish ⚠️ With caution
    Hard care · Peaceful · 60 cm · 22–28 °C (72–82 °F)
    Black Doras Catfish may hunt Flowerhorn Cichlid, fry or shrimplets — safest in a heavily planted tank.
  • Blood Red Tiger Pleco ⚠️ With caution
    Medium care · Peaceful · 6 cm · 24–29 °C (75–84 °F)
    Flowerhorn Cichlid may bully the smaller Blood Red Tiger Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.

+ 47 more “with caution” pairings — see the interactive checker above.

Avoid

Fish to avoid keeping with a flowerhorn cichlid

  • Mekong Giant Catfish ⛔ Avoid
    Hard care · Semi-aggressive · 300 cm · 20–28 °C (68–82 °F)
    Flowerhorn Cichlid and Mekong Giant Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Wels Catfish ⛔ Avoid
    Hard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)
    Flowerhorn Cichlid and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Alligator Gar ⛔ Avoid
    Hard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)
    Flowerhorn Cichlid and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Redtail Catfish ⛔ Avoid
    Hard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)
    Flowerhorn Cichlid and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Fire Eel ⛔ Avoid
    Medium care · Semi-aggressive · 100 cm · 24–28 °C (75–82 °F)
    Two assertive fish, one genuinely aggressive: Flowerhorn Cichlid and Fire Eel will hold territory and clash.
  • Clown Knifefish ⛔ Avoid
    Hard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)
    Two assertive fish, one genuinely aggressive: Flowerhorn Cichlid and Clown Knifefish will hold territory and clash.
  • Koi ⛔ Avoid
    Medium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)
    Koi (90 cm) is big enough to swallow the 30 cm Flowerhorn Cichlid whole.
  • Spotted Gar ⛔ Avoid
    Hard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)
    Flowerhorn Cichlid and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.

+ 272 more to avoid — the checker above flags every one.

Interactive tool

Check any fish against a flowerhorn cichlid

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

Tank-mate checker

Will it live with a Flowerhorn Cichlid?

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

  • Elephant-nose Knifefish✅ Compatible
    Peaceful · 35 cm · Hard care · 24–29 °C (75–84 °F)
    • Compatible on the things that matter: shared water near 25–29 °C, workable temperaments, and no predator-and-prey size gap.
  • Marbled Hoplo✅ Compatible
    Peaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
    • 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.
  • Snowball Pleco✅ Compatible
    Peaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
    • Compatible on the things that matter: shared water near 25–30 °C, workable temperaments, and no predator-and-prey size gap.
  • Spotted Talking Catfish✅ Compatible
    Peaceful · 15 cm · Easy care · 22–26 °C (72–79 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–26 °C — no size, zone or temperament conflicts.
  • Yellow-spotted Pleco✅ Compatible
    Peaceful · 35 cm · Medium care · 24–27 °C (75–81 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–27 °C — no size, zone or temperament conflicts.
  • Banjo Catfish⚠️ With caution
    Peaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
    • Flowerhorn Cichlid may hunt Banjo Catfish, fry or shrimplets — safest in a heavily planted tank.
  • Black Doras Catfish⚠️ With caution
    Peaceful · 60 cm · Hard care · 22–28 °C (72–82 °F)
    • Black Doras Catfish may hunt Flowerhorn Cichlid, fry or shrimplets — safest in a heavily planted tank.
    • Your 340 L tank is below the ~500 L this pairing really wants — crowding raises aggression.
  • Bristlenose Pleco⚠️ With caution
    Peaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
    • Flowerhorn Cichlid may bully the smaller Bristlenose Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Clown Loach⚠️ With caution
    Peaceful · 30 cm · Medium care · 25–30 °C (77–86 °F)
    • Your 340 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
  • Common Pleco⚠️ With caution
    Peaceful · 45 cm · Medium care · 22–28 °C (72–82 °F)
    • Your 340 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
  • Denison Barb⚠️ With caution
    Peaceful · 15 cm · Medium care · 18–25 °C (64–77 °F)
    • Flowerhorn Cichlid is aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
    • Flowerhorn Cichlid may hunt Denison Barb, fry or shrimplets — safest in a heavily planted tank.
    • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
  • Discus⚠️ With caution
    Peaceful · 20 cm · Hard care · 28–31 °C (82–88 °F)
    • Flowerhorn Cichlid is aggressive and may chase or nip the smaller Discus — plant heavily and break up sight lines.
    • Keep Discus in a shoal of 6+ or it gets stressed and nippy.
  • Giant Glass Catfish⚠️ With caution
    Peaceful · 15 cm · Medium care · 22–27 °C (72–81 °F)
    • Flowerhorn Cichlid is aggressive and may chase or nip the smaller Giant Glass Catfish — plant heavily and break up sight lines.
  • Medusa Pleco⚠️ With caution
    Peaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
    • Flowerhorn Cichlid may bully the smaller Medusa Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Moonlight Gourami⚠️ With caution
    Peaceful · 15 cm · Easy care · 25–30 °C (77–86 °F)
    • Expect Flowerhorn Cichlid to harass Moonlight Gourami at times; give dense cover and watch them at feeding.
    • Moonlight Gourami is small enough to tempt Flowerhorn Cichlid; only risk it in a densely planted setup with hiding spots.
  • Porthole Catfish⚠️ With caution
    Peaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
    • Flowerhorn Cichlid may bully the smaller Porthole Catfish, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Rubber Lip Pleco⚠️ With caution
    Peaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
    • Flowerhorn Cichlid may bully the smaller Rubber Lip Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Sailfin Pleco⚠️ With caution
    Peaceful · 50 cm · Medium care · 22–28 °C (72–82 °F)
    • Your 340 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
  • Spotted Rubbernose Pleco⚠️ With caution
    Peaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
    • Flowerhorn Cichlid may bully the smaller Spotted Rubbernose Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Upside-down Catfish⚠️ With caution
    Peaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
    • Flowerhorn Cichlid may bully the smaller Upside-down Catfish, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Zebra Pleco⚠️ With caution
    Peaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
    • Flowerhorn Cichlid may bully the smaller Zebra Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Alligator Gar⛔ Not recommended
    Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
    • Flowerhorn Cichlid and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
    • Alligator Gar (250 cm) is big enough to swallow the 30 cm Flowerhorn Cichlid whole.
    • Your 340 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
  • Clown Knifefish⛔ Not recommended
    Aggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
    • Two assertive fish, one genuinely aggressive: Flowerhorn Cichlid and Clown Knifefish will hold territory and clash.
    • Size gap is too large (90 vs 30 cm): Clown Knifefish will treat Flowerhorn Cichlid as food.
    • Your 340 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
  • Fire Eel⛔ Not recommended
    Semi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
    • Two assertive fish, one genuinely aggressive: Flowerhorn Cichlid and Fire Eel will hold territory and clash.
    • Flowerhorn Cichlid is bite-sized to a 100 cm predatory fire eel — it will be eaten.
    • Your 340 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
  • Koi⛔ Not recommended
    Peaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
    • Koi (90 cm) is big enough to swallow the 30 cm Flowerhorn Cichlid whole.
    • Your 340 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
  • Mekong Giant Catfish⛔ Not recommended
    Semi-aggressive · 300 cm · Hard care · 20–28 °C (68–82 °F)
    • Flowerhorn Cichlid and Mekong Giant Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Your 340 L tank is below the ~100000 L this pairing really wants — crowding raises aggression.
  • Redtail Catfish⛔ Not recommended
    Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
    • Flowerhorn Cichlid and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Size gap is too large (120 vs 30 cm): Redtail Catfish will treat Flowerhorn Cichlid as food.
    • Your 340 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
  • Spotted Gar⛔ Not recommended
    Aggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
    • Flowerhorn Cichlid and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
    • Spotted Gar (90 cm) is big enough to swallow the 30 cm Flowerhorn Cichlid whole.
    • Your 340 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
  • Wels Catfish⛔ Not recommended
    Aggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
    • Flowerhorn Cichlid and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Size gap is too large (300 vs 30 cm): Wels Catfish will treat Flowerhorn Cichlid as food.
    • Your 340 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.

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 flowerhorn cichlid community tank

Give the group a stable, planted 340 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.

As an Amazon Associate we earn from qualifying purchases — buying through these links costs you nothing extra.

How to choose

How to choose the right tank mates for a flowerhorn cichlid

Flowerhorn Cichlid is aggressive and territorial, so most community fish are unsafe; any tank mate must be large, tough and able to hold its own. It mostly occupies the middle of the tank, so it pairs naturally with species that use the other levels.

Flowerhorn Cichlid grows to about 30 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 15 cm. Match its water, too: aim for 25–30 °C (77–86 °F), pH 6.5–7.5 and 6–20 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.

Flowerhorn Cichlid doesn't need its own kind to feel secure; think twice before keeping more than one if it is territorial. 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 flowerhorn cichlid live with other fish?

Yes — with the right companions. Our checker finds 5 compatible freshwater species for flowerhorn cichlid. 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 flowerhorn cichlid?

Easy, peaceful, similarly-sized species top the list — for example Marbled Hoplo, Spotted Talking Catfish, Snowball Pleco. Use the checker above to match against your own tank size.

What fish should you avoid keeping with a flowerhorn cichlid?

Avoid Mekong Giant Catfish, Wels Catfish, Alligator Gar and similar — usually a temperature, size or temperament clash. The full "avoid" list below gives the reason for each.

How big a tank do flowerhorn cichlid tank mates need?

Start from Flowerhorn Cichlid's own minimum and scale up with every addition. The checker above defaults to a 340 L community tank and flags pairings that need more room — drag the slider to match your setup.

← Back to the full Flowerhorn Cichlid care guide