Blue Flash Cichlid Tank Mates

• Banjo Catfish✅ Compatible
  Peaceful · 15 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.
• Bearded Corydoras✅ Compatible
  Peaceful · 10 cm · Medium care · 18–24 °C (64–75 °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 Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Bristlenose Pleco✅ Compatible
  Peaceful · 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.
• Burmese Loach✅ Compatible
  Peaceful · 9 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.
• Clown Pleco✅ Compatible
  Peaceful · 9 cm · Medium care · 24–28 °C (75–82 °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.
• Discus✅ Compatible
  Peaceful · 20 cm · Hard care · 28–31 °C (82–88 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 28–28 °C — no size, zone or temperament conflicts.
  • Keep Discus in a shoal of 6+ or it gets stressed and nippy.
• Giant Kuhli Loach✅ Compatible
  Peaceful · 12 cm · Easy care · 24–30 °C (75–86 °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.
• Kuhli Loach✅ Compatible
  Peaceful · 10 cm · Easy care · 24–30 °C (75–86 °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.
• Leopard Frog Pleco✅ Compatible
  Peaceful · 9 cm · Medium care · 25–30 °C (77–86 °F)
  • Compatible on the things that matter: shared water near 25–28 °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.
• Marbled Hoplo✅ Compatible
  Peaceful · 14 cm · Easy care · 22–28 °C (72–82 °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.
• Medusa Pleco✅ Compatible
  Peaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
  • Compatible on the things that matter: shared water near 26–28 °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.
• Pantanal Corydoras✅ Compatible
  Peaceful · 8 cm · Medium care · 22–27 °C (72–81 °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 Pantanal Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Peppered Corydoras✅ Compatible
  Peaceful · 7 cm · Easy care · 18–26 °C (64–79 °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 Peppered Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Porthole Catfish✅ Compatible
  Peaceful · 10 cm · Easy care · 22–28 °C (72–82 °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.
• Rubber Lip Pleco✅ Compatible
  Peaceful · 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.
• Snowball Pleco✅ Compatible
  Peaceful · 16 cm · Medium care · 24–30 °C (75–86 °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.
• Spotted Corydoras✅ Compatible
  Peaceful · 7 cm · Easy care · 22–27 °C (72–81 °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 Spotted Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Spotted Rubbernose Pleco✅ Compatible
  Peaceful · 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.
• Spotted Talking Catfish✅ Compatible
  Peaceful · 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.
• Striped Eel Loach✅ Compatible
  Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °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.
• Upside-down Catfish✅ Compatible
  Peaceful · 10 cm · Easy care · 22–26 °C (72–79 °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.
• Weather Loach✅ Compatible
  Peaceful · 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.
• Zebra Loach✅ Compatible
  Peaceful · 9 cm · Medium care · 23–26 °C (73–79 °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.
• Zebra Pleco✅ Compatible
  Peaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
  • Compatible on the things that matter: shared water near 26–28 °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.
• Angelfish⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–30 °C (75–86 °F)
  • Blue Flash Cichlid and Angelfish can both be territorial; doable with space and dense planting, but watch for chasing.
• Calvus Cichlid⚠️ With caution
  Semi-aggressive · 14 cm · Medium care · 24–27 °C (75–81 °F)
  • Blue Flash Cichlid and Calvus Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
• Clown Barb⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–30 °C (75–86 °F)
  • pH preferences only just meet (Blue Flash Cichlid 7–8 vs Clown Barb 6–6.5) — target the overlap and acclimate slowly.
  • Blue Flash Cichlid and Clown Barb can both be territorial; doable with space and dense planting, but watch for chasing.
  • Keep Clown Barb in a shoal of 6+ or it gets stressed and nippy.
• Denison Barb⚠️ With caution
  Peaceful · 15 cm · Medium care · 18–25 °C (64–77 °F)
  • Blue Flash Cichlid is semi-aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Dolphin Cichlid⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 23–28 °C (73–82 °F)
  • Blue Flash Cichlid and Dolphin Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
• Electric Blue Acara⚠️ With caution
  Semi-aggressive · 16 cm · Medium care · 22–28 °C (72–82 °F)
  • Blue Flash Cichlid and Electric Blue Acara can both be territorial; doable with space and dense planting, but watch for chasing.
• Emperor Peacock Cichlid⚠️ With caution
  Semi-aggressive · 16 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.
• Eureka Red Peacock Cichlid⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–28 °C (75–82 °F)
  • Blue Flash Cichlid and Eureka Red Peacock Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
• Firemouth Cichlid⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 22–29 °C (72–84 °F)
  • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
• Giant Glass Catfish⚠️ With caution
  Peaceful · 15 cm · Medium care · 22–27 °C (72–81 °F)
  • Expect Blue Flash Cichlid to harass Giant Glass Catfish at times; give dense cover and watch them at feeding.
• Gold Zebra Loach⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 25–29 °C (77–84 °F)
  • Blue Flash Cichlid and Gold Zebra Loach can both be territorial; doable with space and dense planting, but watch for chasing.
• Green Phantom Pleco⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 26–30 °C (79–86 °F)
  • Blue Flash Cichlid and Green Phantom Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
• Moonlight Gourami⚠️ With caution
  Peaceful · 15 cm · Easy care · 25–30 °C (77–86 °F)
  • Blue Flash Cichlid is semi-aggressive and may chase or nip the smaller Moonlight Gourami — plant heavily and break up sight lines.
• Rainbow Cichlid⚠️ With caution
  Semi-aggressive · 14 cm · Easy care · 22–28 °C (72–82 °F)
  • Blue Flash Cichlid and Rainbow Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
• Swordtail⚠️ With caution
  Semi-aggressive · 14 cm · Easy care · 22–28 °C (72–82 °F)
  • Blue Flash Cichlid and Swordtail can both be territorial; doable with space and dense planting, but watch for chasing.
• Yoyo Loach⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 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.
• Alligator Gar⛔ Not recommended
  Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
  • Blue Flash Cichlid and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Blue Flash Cichlid is bite-sized to a 250 cm predatory alligator gar — it will be eaten.
  • Your 210 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: Blue Flash Cichlid and Clown Knifefish will hold territory and clash.
  • Blue Flash Cichlid is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
  • Your 210 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)
  • Size gap is too large (100 vs 15 cm): Fire Eel will treat Blue Flash Cichlid as food.
  • Blue Flash Cichlid and Fire Eel can both be territorial; doable with space and dense planting, but watch for chasing.
  • Your 210 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)
  • Blue Flash Cichlid is bite-sized to a 90 cm koi — it will be eaten.
  • Your 210 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
• Redtail Catfish⛔ Not recommended
  Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
  • Blue Flash Cichlid and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Blue Flash Cichlid is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
  • Your 210 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)
  • Blue Flash Cichlid and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Size gap is too large (90 vs 15 cm): Spotted Gar will treat Blue Flash Cichlid as food.
  • Your 210 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)
  • Blue Flash Cichlid and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Blue Flash Cichlid is bite-sized to a 300 cm predatory wels catfish — it will be eaten.
  • Your 210 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
• Wolf Cichlid⛔ Not recommended
  Aggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
  • Two assertive fish, one genuinely aggressive: Blue Flash Cichlid and Wolf Cichlid will hold territory and clash.
  • Size gap is too large (72 vs 15 cm): Wolf Cichlid will treat Blue Flash Cichlid as food.
  • Your 210 L tank is below the ~760 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.