Electric Blue Hap Tank Mates

Electric Blue Hap is semi-aggressive, so its tank mates need choosing with care. Here are the 3 freshwater species that pair well with an electric blue hap — plus the 193 to avoid — with a live checker you can tune to your own tank.

By The Aquarium DB Team • Updated June 8, 2026 • Full Electric Blue Hap care guide →
Best matches

The best tank mates for an electric blue hap

  • Upside-down Catfish ✅ Compatible
    Easy care · Peaceful · 10 cm · 22–26 °C (72–79 °F)
    Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
  • Marbled Hoplo ✅ Compatible
    Easy 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 ✅ Compatible
    Easy care · Peaceful · 15 cm · 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.
With caution

Electric Blue Hap tank mates that can work with care

  • Adolf's Cory ⚠️ With caution
    Medium care · Peaceful · 5.5 cm · 22–26 °C (72–79 °F)
    pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Adolf's Cory 5.8–7.2) — target the overlap and acclimate slowly.
  • Afra Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 10 cm · 24–28 °C (75–82 °F)
    Electric Blue Hap and Afra Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
  • Agassiz's Corydoras ⚠️ With caution
    Easy care · Peaceful · 6 cm · 22–28 °C (72–82 °F)
    pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Agassiz's Corydoras 6–7.5) — target the overlap and acclimate slowly.
  • Agassiz's Dwarf Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 9 cm · 24–30 °C (75–86 °F)
    Different pH ranges (7.8–8.5 vs 5–7); doable if you sit in the shared band, but not ideal long-term.
  • Altifrons Geophagus ⚠️ With caution
    Medium care · Semi-aggressive · 25 cm · 24–28 °C (75–82 °F)
    Different pH ranges (7.8–8.5 vs 5–7.5); doable if you sit in the shared band, but not ideal long-term.
  • Angelfish ⚠️ With caution
    Medium care · Semi-aggressive · 15 cm · 24–30 °C (75–86 °F)
    pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Angelfish 6–7.5) — target the overlap and acclimate slowly.
  • Angelicus Synodontis ⚠️ With caution
    Medium 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 caution
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Assassin Snail 6.5–7.5) — target the overlap and acclimate slowly.

+ 136 more “with caution” pairings — see the interactive checker above.

Avoid

Fish to avoid keeping with an electric blue hap

  • Wels Catfish ⛔ Avoid
    Hard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)
    Electric Blue Hap 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)
    Electric Blue Hap 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)
    Electric Blue Hap 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)
    Size gap is too large (100 vs 20 cm): Fire Eel will treat Electric Blue Hap as food.
  • Clown Knifefish ⛔ Avoid
    Hard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)
    Two assertive fish, one genuinely aggressive: Electric Blue Hap and Clown Knifefish will hold territory and clash.
  • Koi ⛔ Avoid
    Medium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)
    Electric Blue Hap 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)
    Electric Blue Hap and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Wolf Cichlid ⛔ Avoid
    Hard care · Aggressive · 72 cm · 24–30 °C (75–86 °F)
    Two assertive fish, one genuinely aggressive: Electric Blue Hap and Wolf Cichlid will hold territory and clash.

+ 185 more to avoid — the checker above flags every one.

Interactive tool

Check any fish against an electric blue hap

Dial in your exact tank size and filter by result — the checker scores every species in our database against an electric blue hap, with the reasoning for each verdict.

Tank-mate checker

Will it live with a Electric Blue Hap?

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

  • Marbled Hoplo✅ Compatible
    Peaceful · 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.
  • Spotted Talking Catfish✅ Compatible
    Peaceful · 15 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.
  • Upside-down Catfish✅ Compatible
    Peaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
  • Altifrons Geophagus⚠️ With caution
    Semi-aggressive · 25 cm · Medium care · 24–28 °C (75–82 °F)
    • Different pH ranges (7.8–8.5 vs 5–7.5); doable if you sit in the shared band, but not ideal long-term.
    • Water hardness preferences differ (Electric Blue Hap 10–20 vs Altifrons Geophagus 1–8 dGH).
    • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
    • Your 250 L tank is below the ~378 L this pairing really wants — crowding raises aggression.
    • Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
  • Angelicus Synodontis⚠️ With caution
    Semi-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.
  • Blood Parrot Cichlid⚠️ With caution
    Semi-aggressive · 20 cm · Medium care · 24–28 °C (75–82 °F)
    • Different pH ranges (7.8–8.5 vs 6.5–7.4); doable if you sit in the shared band, but not ideal long-term.
    • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
  • Discus⚠️ With caution
    Peaceful · 20 cm · Hard care · 28–31 °C (82–88 °F)
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Discus 5.5–7) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (10–20 vs 1–8 dGH) — a compromise, not a perfect match.
    • Expect Electric Blue Hap to harass Discus at times; give dense cover and watch them at feeding.
    • Keep Discus in a shoal of 6+ or it gets stressed and nippy.
  • Electric Blue Acara⚠️ With caution
    Semi-aggressive · 16 cm · Medium care · 22–28 °C (72–82 °F)
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Electric Blue Acara 6–7.5) — target the overlap and acclimate slowly.
    • Electric Blue Hap 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.
  • Fire Blue Empress Cichlid⚠️ With caution
    Semi-aggressive · 18 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.
    • Your 250 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
  • Goldie Pleco⚠️ With caution
    Semi-aggressive · 20 cm · Medium care · 24–29 °C (75–84 °F)
    • Different pH ranges (7.8–8.5 vs 6–7.5); doable if you sit in the shared band, but not ideal long-term.
    • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
  • Green Severum⚠️ With caution
    Semi-aggressive · 20 cm · Medium care · 23–29 °C (73–84 °F)
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Green Severum 5.5–7.5) — target the overlap and acclimate slowly.
    • Electric Blue Hap and Green Severum can both be territorial; doable with space and dense planting, but watch for chasing.
  • Guyana Flag Cichlid⚠️ With caution
    Semi-aggressive · 18 cm · Medium care · 24–30 °C (75–86 °F)
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Guyana Flag Cichlid 5.5–7.5) — target the overlap and acclimate slowly.
    • Electric Blue Hap and Guyana Flag Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
  • Honeycomb Pleco⚠️ With caution
    Semi-aggressive · 21 cm · Medium care · 24–29 °C (75–84 °F)
    • Different pH ranges (7.8–8.5 vs 6–7.5); doable if you sit in the shared band, but not ideal long-term.
    • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
    • Your 250 L tank is below the ~280 L this pairing really wants — crowding raises aggression.
  • Platinum Acara⚠️ With caution
    Semi-aggressive · 20 cm · Medium care · 23–28 °C (73–82 °F)
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Platinum Acara 6.5–7.5) — target the overlap and acclimate slowly.
    • Electric Blue Hap and Platinum Acara can both be territorial; doable with space and dense planting, but watch for chasing.
  • Snowball Pleco⚠️ With caution
    Peaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
    • Different pH ranges (7.8–8.5 vs 5.5–7.5); doable if you sit in the shared band, but not ideal long-term.
  • Spanner Barb⚠️ With caution
    Semi-aggressive · 18 cm · Medium care · 23–29 °C (73–84 °F)
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Spanner Barb 6–7.2) — target the overlap and acclimate slowly.
    • Electric Blue Hap and Spanner Barb can both be territorial; doable with space and dense planting, but watch for chasing.
    • Electric Blue Hap is slow and long-finned; a busy spanner barb shoal tends to nip at it. Keep spanner barb in a proper group of 6+ and watch them closely.
    • Keep Spanner Barb in a shoal of 6+ or it gets stressed and nippy.
  • Striped Raphael Catfish⚠️ With caution
    Semi-aggressive · 20 cm · Medium care · 24–28 °C (75–82 °F)
    • Different pH ranges (7.8–8.5 vs 6.5–7.6); doable if you sit in the shared band, but not ideal long-term.
    • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
  • Tiger Loach⚠️ With caution
    Semi-aggressive · 20 cm · Medium care · 23–27 °C (73–81 °F)
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Tiger Loach 6.5–7.5) — target the overlap and acclimate slowly.
    • Electric Blue Hap and Tiger Loach can both be territorial; doable with space and dense planting, but watch for chasing.
  • Alligator Gar⛔ Not recommended
    Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
    • Electric Blue Hap and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
    • Size gap is too large (250 vs 20 cm): Alligator Gar will treat Electric Blue Hap as food.
    • Your 250 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: Electric Blue Hap and Clown Knifefish will hold territory and clash.
    • Electric Blue Hap is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Clown Knifefish 6–7.5) — target the overlap and acclimate slowly.
    • Your 250 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 20 cm): Fire Eel will treat Electric Blue Hap as food.
    • pH preferences only just meet (Electric Blue Hap 7.8–8.5 vs Fire Eel 6.5–7.5) — target the overlap and acclimate slowly.
    • Electric Blue Hap and Fire Eel can both be territorial; doable with space and dense planting, but watch for chasing.
    • Your 250 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)
    • Electric Blue Hap is bite-sized to a 90 cm koi — it will be eaten.
    • Your 250 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)
    • Electric Blue Hap and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Electric Blue Hap is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
    • Different pH ranges (7.8–8.5 vs 6–7.5); doable if you sit in the shared band, but not ideal long-term.
    • Your 250 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)
    • Electric Blue Hap and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
    • Electric Blue Hap is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
    • Different pH ranges (7.8–8.5 vs 6.5–7.5); doable if you sit in the shared band, but not ideal long-term.
    • Your 250 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)
    • Electric Blue Hap and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Electric Blue Hap is bite-sized to a 300 cm predatory wels catfish — it will be eaten.
    • Different pH ranges (7.8–8.5 vs 6.5–7.5); doable if you sit in the shared band, but not ideal long-term.
    • Your 250 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: Electric Blue Hap and Wolf Cichlid will hold territory and clash.
    • Electric Blue Hap is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.
    • Your 250 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.

Setting up an electric blue hap community tank

Give the group a stable, planted 250 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 an electric blue hap

Being semi-aggressive, electric blue hap can nip or harass smaller, slower or long-finned fish — give it space, broken sight-lines and similarly robust companions. It mostly occupies the middle of the tank, so it pairs naturally with species that use the other levels.

Electric Blue Hap grows to about 20 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 10 cm. Match its water, too: aim for 24–28 °C (75–82 °F), pH 7.8–8.5 and 10–20 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.

Electric Blue Hap 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 an electric blue hap live with other fish?

Yes — with the right companions. Our checker finds 3 compatible freshwater species for electric blue hap. 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 electric blue hap?

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

What fish should you avoid keeping with an electric blue hap?

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 electric blue hap tank mates need?

Start from Electric Blue Hap's own minimum and scale up with every addition. The checker above defaults to a 250 L community tank and flags pairings that need more room — drag the slider to match your setup.

← Back to the full Electric Blue Hap care guide