Electric Blue Acara Care Guide

The electric blue acara is the cichlid that breaks the family's bad reputation - genuinely peaceful for a cichlid of its size, and an easy, watchable centrepiece for a robust community. The catch is hidden in plain sight: at around 16 cm it is a confident predator that eats any fish or shrimp small enough to fit in its mouth, so "peaceful" never means "safe with nano fish." It is the iridescent line-bred colour strain of the wild Blue Acara, Andinoacara pulcher.

Electric Blue Acara at a glance

The sourced figures the welfare engine uses to judge Electric Blue Acara — the parseable key facts.

Where it comes from

Wild A. pulcher comes from Trinidad and Tobago and parts of Venezuela, where it is an adaptable generalist - FishBase and Seriously Fish describe it occupying everything from murky still waters through to flowing clearwater streams and rivers. That adaptable origin is the whole reason this is a forgiving fish on parameters: it naturally spans soft acidic to hard alkaline water, so unlike the German blue ram it asks for no RO water and no chasing of an exact pH. The stream-and-pool generalist habit explains the rest of the setup - it wants open swimming length plus cover and a sand or smooth fine-gravel bottom it can dig and sift through without damaging itself. The one trait the wide tolerance hides is that it dislikes accumulated organic pollution; it shrugs off a range of pH and hardness but not a dirty tank.

Did you know?

• It is the cichlid that breaks the family rule - Seriously Fish calls it peaceful for a cichlid of this size, a true community centrepiece for big-enough tankmates.
• It is a substrate spawner with a mouthbrooder's trick: in danger the male shelters his fry inside his mouth, even though the eggs were laid on rock.
• Its colour is bred, not painted - the electric blue is a selectively line-bred strain of the wild Blue Acara, not a dyed fish, though the exact lineage is undocumented and some call it a hybrid.
• Both parents guard the eggs and shepherd the free-swimming fry - easy, watchable biparental cichlid care.
• Wild A. pulcher is assessed by the IUCN as Least Concern and rated high-resilience, with a population doubling time under 15 months.

Tank size — and why

Around 30 US gallons on a four-foot (120 cm) footprint is the practical floor for a single fish, with 45-55 gallons the honest figure for a pair or a community. The driver is length and territory, not height: this is a 16 cm active, digging cichlid that needs swimming room, a dig-able open foreground and a defendable patch. Seriously Fish frames it as a 120 by 30 cm base for a pair, emphasising footprint over depth, and a breeding pair becomes territorial enough that sightline breaks and floor area matter more than volume.

As a guide, a 30-gallon tank comfortably suits about 1 Electric Blue Acara as a single-species display, leaving room for tankmates.

How big does it really get?

Full-grown Electric Blue Acara reach about 16 cm (6.3 in) long, but they are usually sold at only about 3 cm (1.2 in) — a typical shop size (estimate). At full size, Electric Blue Acara needs roughly a 30-gallon tank, about 76 cm long; a common 10-gallon starter kit is only about 51 cm.

Adult size is sourced; the shop size is a typical-juvenile estimate; tank length is approximate for a standard 30-gallon aquarium.

Water parameters in practice

Aim for about 24-26 C and a near-neutral pH of 6.5-7.5, but the headline is how wide the safe band actually is - roughly 22-28 C in captivity, pH tolerated from 6.0 to 8.0, and hardness up to around 25 dH. FishBase even gives a cool wild range of 18-23 C, so this fish is more cold-tolerant than most community tropicals; a warm-room community temperature suits it fine. Do not read that parameter tolerance as toughness across the board: the acara is sensitive to accumulated pollution, and poor water quality weakens its immune system and opens the door to disease. Keep ammonia and nitrite at zero and nitrate low with weekly changes. The real risk is organic load, not the pH number.

Diet & feeding

In the wild it is a carnivore-insectivore taking worms, crustaceans and insects. In the tank it is an omnivore leaning carnivorous that readily accepts a quality sinking cichlid pellet or flake as a base, and does best topped up with frozen and live bloodworm, brine shrimp, daphnia, mysis, chopped mussel or prawn and earthworm, plus a little vegetable matter. Feed one or two small meals a day, only what is cleared in a couple of minutes, because the bioload is heavy and overfeeding fouls the water this fish is sensitive to. The load-bearing point is its predatory edge: a confident, opportunistic feeder, it will eat any small fish or shrimp that fits in its mouth. That is predation, not aggression, and it is the single fact that governs the tankmate list.

Gear & setup

Give it a sand or smooth fine-gravel substrate so it can dig and sift without barbel or mouth injury, with flat rocks as spawning sites and robust, well-anchored plants, driftwood and rockwork to break sightlines. Filtration should be strong and oversized - a large meat-eating cichlid produces a lot of waste, so plan for the high bioload and back it with weekly water changes. Flow can be moderate; the fish tolerates typical filtration. Keep the tank covered as standard cichlid practice, since a large active fish can startle and jump.

Temperament & behaviour

Seriously Fish calls it peaceful for a cichlid of this size, and it is - calm toward similar-sized tankmates and the textbook exception to cichlid aggression. It is not, however, a docile pet: it stays a predatory, territorial cichlid. Its only real aggression is breeding territoriality, when a pair guarding eggs or fry will drive other fish off their patch - normal behaviour, not illness, and a reason to plan tank size and sightline breaks. The thing people misread as aggression toward small fish is actually predation: it simply eats them.

Group & social needs

Keep it singly or as a bonded pair - it is not a schooling fish. As a centrepiece it works beautifully in a medium or large community of fish too big to be swallowed. Pairs form from a group of juveniles grown out together rather than by forcing two adults together, and a spawning pair will hold and defend a territory, so a community tank needs the extra footprint and broken sightlines to keep the peace.

Compatible tank mates (preview)

A short, engine-cleared shortlist — the species TankStocking's welfare engine clears with Electric Blue Acara and that suit its size and temperament best. Tap any to load the pairing in the planner.

• Boesemani Rainbowfish — Peaceful temperament, similar adult size.
• Bolivian Ram — Peaceful temperament, similar adult size.
• Brilliant Rasbora — Peaceful temperament, similar adult size.

This engine-cleared shortlist is Electric Blue Acara's tankmate surface for now — a dedicated tank-mates guide can follow for high-demand species.

Breeding & sexing

This is one of the easiest substrate-spawning cichlids in the hobby and a good introduction to cichlid parenting. Sex it at maturity (around 4-5 inches): males develop pointed, elongated dorsal and anal fin tips, females are rounder and heavier-bodied. It is a monogamous biparental substrate spawner - condition the pair on live and frozen food, give a flat rock or slate and slightly warmer, clean water around 24-26 C. The female lays up to about 200 eggs on the rock and the male fertilises them; both parents guard the eggs and larvae, eggs hatch in roughly two to five days, and in danger the male may shelter the fry inside his mouth. Fry take baby brine shrimp and powdered fry food.

Lifespan

Around 8-10 years with good care is the realistic figure; some guides cite far higher numbers in exceptional cases, but treat those as outliers. What shortens a life, in order: chronic poor water quality weakening the immune system; an undersized tank that stresses or stunts a 16 cm digging cichlid; aggressive or oversized tankmates that bully or injure the comparatively gentle acara; and an under-maintained heavy bioload. Get the tank size, filtration and water changes right and this is a decade-long fish.

Common mistakes

• Reading "peaceful" as "community-safe with small fish." It eats nano fish, fry and dwarf shrimp that fit in its mouth, so don't build its tank around tiny tetras, rasboras or a shrimp colony.
• Undersizing the tank. A 16 cm digging cichlid needs roughly 30 gallons and a four-foot footprint as a single fish, and 45-55 gallons for a pair or community; small tanks stunt and stress it.
• Underestimating the bioload. A large carnivorous cichlid produces a lot of waste - without oversized filtration and weekly water changes the disease cascade follows, because this fish is sensitive to accumulated pollution.
• Pairing it with large aggressive cichlids like green terrors or oscars in too little space - the comparatively gentle acara gets bullied or injured.
• Assuming wide pH and hardness tolerance means it shrugs off anything. It tolerates soft-acidic through hard-alkaline water but not a chronically dirty, under-maintained tank.

Signs of trouble

• Faded colour, clamped fins, hiding and loss of appetite - general stress, usually water quality or an unsuitable tankmate.
• Scratching or flashing against decor - skin or gill flukes, or early ich.
• White spots on the body and fins - ich, often after a temperature swing; stable warmth is both prevention and part of the cure.
• Rapid gilling and listlessness - check ammonia, nitrite and nitrate first; chronic organic pollution is the usual culprit.
• Fin erosion or bacterial sores - the heavy-bioload trap of a neglected, over-stocked tank.

Is this fish right for you?

Do not buy an electric blue acara if your tank is built around small fish, fry or a dwarf-shrimp colony - it will eat anything bite-size, and no amount of "peaceful" labelling changes that. Do not buy one if you can't give it a roughly four-foot footprint, oversized filtration and weekly water changes for a heavy bioload, or if your other stock includes large hyper-aggressive cichlids that will bully it. On stock quality, the electric blue is a line-bred colour strain - some vendors even label it a hybrid, and the exact lineage is undocumented - so choose active, well-coloured, undeformed fish from a reputable source and be wary of weak, stunted farm stock. Given a big enough tank, clean water and tankmates too large to swallow, it is a hardy, rewarding first cichlid.

Common questions

Are electric blue acaras aggressive?

No, by cichlid standards - Seriously Fish calls them peaceful for a cichlid of this size, and they are calm toward similar-sized tankmates. The exceptions are breeding, when a pair turns territorial and drives other fish off its patch, and small tankmates, which it eats. That is predation rather than aggression.

Do electric blue acaras eat other fish and shrimp?

Yes. It is a confident predator that eats any fish or shrimp small enough to fit in its mouth - neon and ember tetras, chili rasboras, fry and dwarf shrimp are all food. Keep it only with fish too big to swallow; this is the headline compatibility rule.

What size tank does an electric blue acara need?

About 30 US gallons on a four-foot footprint for a single fish, and 45-55 gallons for a pair or community. Length and floor area matter more than height for this active, digging cichlid, and a breeding pair needs room and sightline breaks for its territory.

Are electric blue acaras good for beginners?

Yes, with caveats - it is one of the more forgiving cichlids on water parameters and one of the easiest to breed. But it needs a large tank, strong filtration and weekly water changes for its heavy bioload, and it is sensitive to accumulated pollution, so it suits a beginner who can meet those basics.

Is the electric blue acara a hybrid or a natural fish?

It is a selectively line-bred bright-blue colour strain of the wild Andinoacara pulcher (the Blue Acara). Some vendors label it a hybrid and the exact lineage is not authoritatively documented, but its care is identical to A. pulcher.

Sources & confidence

Sources & confidence (9 species)

These back the Electric Blue Acara figures and the previewed tank mates above. Each figure is read from the TankStocking species database (v2026.06); below is the care reference behind it and how confident we are in that data. Confidence reflects the source quality, not whether any pairing is safe. Full source list and the welfare model are on the methodology page.

• Electric Blue Acara Andinoacara pulcher — Seriously Fish (seriouslyfish.com/species/andinoacara-pulcher); Aquariadise high confidence
• Boesemani Rainbowfish Melanotaenia boesemani — Seriously Fish; Aquarium Co-Op Boesemani guide high confidence
• Bolivian Ram Mikrogeophagus altispinosus — Seriously Fish (seriouslyfish.com/species/mikrogeophagus-altispinosus) high confidence
• Brilliant Rasbora Rasbora einthovenii — Seriously Fish (seriouslyfish.com/species/rasbora-einthovenii) high confidence
• Bristlenose Pleco Ancistrus sp. — Aquarium Source / aqua-fish.net Ancistrus care guides high confidence
• Clown Pleco Panaqolus maccus — Fish Laboratory (fishlaboratory.com/fish/clown-pleco); AquariumStoreDepot high confidence
• Congo Tetra Phenacogrammus interruptus — Seriously Fish (seriouslyfish.com/species/phenacogrammus-interruptus) high confidence
• Dwarf Gourami Trichogaster lalius — Seriously Fish (seriouslyfish.com/species/trichogaster-lalius) high confidence
• Gold Barb Barbodes semifasciolatus — Fishlore gold barb profile / FishBase Barbodes semifasciolatus high confidence

Care-guide sources (6)

This guide synthesises the references below; where they disagree, the range and the disagreement are noted in the text above. The figures in the key-facts box are read from the TankStocking species database (v2026.06). Full welfare model on the methodology page.

• FishBase - Andinoacara pulcher — authority (Gill, 1858), Cichlasomatinae, max 16.0 cm TL, Trinidad/Venezuela range, benthopelagic, wild 18-23 C / pH 6.5-8.0 / dH up to 25, diet 'worms, crustaceans and insects', biparental guarding, male sheltering fry in mouth, IUCN Least Concern, high resilience
• Seriously Fish - Andinoacara pulcher — synonym Cychlasoma pulchrum, 130-150 mm SL, 'adaptable species...murky still waters through to flowing clearwater streams', captive 22-28 C / pH 6.5-8.0 / 90-447 ppm, 120x30 cm pair footprint, 'peaceful for a cichlid of this size', mainly carnivorous, sexing, 'one of the easiest substrate spawning cichlids', ~200 eggs, hatch 48-72 h
• Aquariadise - Electric Blue Acara Care Guide — 6-7 in, 8-10 yr captive, 30 gal on a 4-ft footprint / 45 gal pair, 72-82 F (ideal ~76), pH 6.0-7.5, 6-20 dH, carnivore-leaning diet, line-bred colour morph, 'peaceful...aggressive during spawning', 'very small fish can be hassled', tankmates, sexing, 'quite easy to breed', 'fairly hardy...poor water quality...immune system...weakened'
• Aquarium Source - Electric Blue Acara 101 — 6-7 in, 8-10 yr, 30 gal minimum (+15 gal per extra fish), 72-82 F, pH 6-7.5, 6-20 dKH, omnivore diet, 'the exception to the rule when it comes to cichlid aggression', small-fish predation caveat, tankmates, low-difficulty breeding, ich and flukes
• Aquatic Arts - Electric Blue Acara (Andinoacara pulcher hybrid), Tank-Bred — vendor listing labelling the morph a tank-bred hybrid; used only to flag the contested lineage of the colour strain
• The Aquarium Guide / Aqulator - Electric Blue Acara care guides — corroborate 6-7 in size, 30 gal minimum, peaceful-for-a-cichlid temperament, and the 'eats small fish and shrimp that fit in the mouth' consensus

More on Electric Blue Acara

Related guides on TankStocking — each scored by the same welfare engine as the planner.

This care guide is a sourced planning reference, not veterinary advice — individual fish, filtration and maintenance all matter. Cycle the tank, test your water, and observe your fish. How TankStocking works →