Tiger Barb Care Guide

The tiger barb is a bold, fast, stripy little cyprinid with a deserved reputation as the hobby's most notorious fin-nipper. Keep it the way it wants to be kept — a big school in a long tank, no trailing-finned neighbours — and it is a hardy, vivid, characterful fish; get the group size wrong and it becomes the reason people regret a community tank.

Tiger Barb at a glance

The sourced figures the welfare engine uses to judge Tiger Barb — the parseable key facts.

Where it comes from

Tiger barbs come from the clear forest streams and vegetated swampy stretches of central and southern Sumatra, with the type locality at Lahat. The trade fish is something of a complex — true Puntigrus tetrazona is the Sumatran animal, but very similar Bornean congeners have been confused and interbred in the hobby for decades, so a shop "tiger barb" may carry mixed ancestry. The wild water is warm, broadly soft-to-neutral and moderately flowing, which explains almost everything about the fish: it is an adaptable, non-blackwater stream swimmer, so farmed stock is hardy and forgiving on chemistry. The failure mode is almost never water chemistry — it is social behaviour. An active, current-loving stream origin means these are strong swimmers that want horizontal length and a bit of flow, not a still planted nano. Released aquarium fish have founded feral populations on several continents, from Singapore to Australia, the USA, Colombia and Suriname.

Did you know?

• It was one of the original GloFish and is a true GMO — engineered to fluoresce using green fluorescent protein from a jellyfish and red from a sea coral, a glow that is heritable and permanent, not dye. The technology traces to Dr Zhiyuan Gong at the National University of Singapore in 1999, was commercialised by Yorktown Technologies for a 2003 US launch, and was acquired by Spectrum Brands in 2017.
• Regulators split over it: the FDA declined to regulate GloFish in 2003 as they aren't food, California banned then re-allowed them, and the EU prohibits their import and sale.
• The green "moss" tiger barb's colour is an optical trick — a melanistic fish whose green sheen is a structural Tyndall-effect scatter over black pigment. There is no green pigment and no wild green population.
• The fin-nipping is a pecking-order ritual, not spite: in a big enough school the barbs play the same game against each other and largely leave tankmates alone.
• It was named and described in 1855 by the prolific Dutch ichthyologist Pieter Bleeker, from Lahat in South Sumatra; the IUCN assesses the wild species as Least Concern.

Tank size — and why

A 20 US gallon tank is the absolute floor, but 30 gallons or more — think an 80 cm-plus footprint — is the real target, and the driver is swimming room and group size, not bioload. Tiger barbs are near-constant sprinters that spend their days racing back and forth, and they police a strict pecking order by chasing. A long tank lets a large school spread out so that hierarchy chasing stays internal and harmless; a cramped or tall tank concentrates the aggression and pushes it onto tankmates and the weakest barbs. Prioritise length over height every time — these are mid-water sprinters, not tall-column fish. A typical adult is around 5–7 cm, with the odd well-fed old fish pushing 8–10 cm, so the space is about behaviour, not body length.

As a guide, a 20-gallon tank comfortably suits about 6–8 Tiger Barb as a single-species display, leaving room for tankmates.

How big does it really get?

Full-grown Tiger Barb reach about 7 cm (2.8 in) long, but they are usually sold at only about 2.5 cm (1 in) — a typical shop size (estimate). At full size, Tiger Barb needs roughly a 20-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 20-gallon aquarium.

Water parameters in practice

Tiger barbs are chemistry-tolerant and hardy as a species, so chasing a precise number is wasted effort — anywhere from soft to moderately hard, and slightly acidic to neutral around pH 6.5, suits them, with a tolerated band of pH 5–8 and 5–19 dGH. What matters more is a fully cycled, stable tank and getting the temperature right. The common mistake is keeping them too cool, like neon tetras: aim for 24–26 °C and warmer, because body colour decays below about 21 °C and the stripes dim near 19 °C. The real fragility here is not the parameters at all but stock quality — heavily inbred batches can be genetically weak — so buy active, full-coloured, undeformed fish from a healthy tank.

Diet & feeding

In the wild the tiger barb is an omnivore taking aquatic invertebrates with smaller amounts of plant material and detritus. In the tank a good-quality flake or small sinking pellet with some vegetable content makes the base, topped up a few times a week with live or frozen bloodworm, daphnia, brine shrimp or mosquito larvae for colour and breeding condition, plus the odd bit of blanched cucumber or courgette. Feed small amounts once or twice a day, only what they clear quickly — they are greedy, fast, competitive feeders. That competitiveness is itself a stocking warning: they out-compete slow or timid tankmates at the surface, so a shy fish risks being starved as well as nipped. Watch for overfeeding, as their waste output is moderate.

Gear & setup

Run a heater set to the mid-to-upper 20s Celsius and a filter giving moderate turnover — Seriously Fish suggests around four to five times tank volume — because these are stream fish that enjoy a current. Use sand or fine gravel, and arrange dense planting and driftwood around the edges and back while leaving open central swimming lanes; those line-of-sight breaks, combined with the long footprint, are one of the main tools for keeping intra-group chasing harmless. They are active, surface-capable swimmers, so a lid is sensible.

Temperament & behaviour

This is an active, fast, semi-aggressive shoaling fish that FishBase bluntly calls notoriously aggressive with a fin-biting reputation. The nipping is not malice but a compulsive pecking-order ritual: tiger barbs maintain a strict internal hierarchy through constant chasing and fin-nipping. In a large school of eight to twelve or more, that drive is directed inward and spread across many fish, so no single barb and crucially no tankmate gets singled out. In small groups of one to five the same urge has nowhere to go and gets redirected — onto other species' fins or onto the weakest barb, which can be harassed to death. They do squabble among themselves even in a good group, but that is normal hierarchy behaviour rather than the lethal pair-fighting of male bettas. The practical lesson is that the long-finned, slow community fish people pair them with — bettas, angelfish, fancy guppies, gouramis, goldfish — are the classic disaster, which is why those species are vetoed from this fish's recommended tankmates regardless of what a coarse size-and-temperament match might suggest: their trailing fins are an irresistible target and they cannot outrun the barbs.

Group & social needs

An obligate schooling fish. Eight to twelve or more is the real target and the single most important husbandry fact for the species; six is a bare, under-spec floor, not a goal. Both FishBase and Seriously Fish specify at least eight to ten specifically to suppress fin-nipping and aggression toward tankmates. Keeping too few is the cardinal error and the number-one reason people regret tiger barbs. Males are smaller, slimmer and more intensely coloured with a red nose in condition; females are larger and rounder-bodied.

Compatible tank mates (preview)

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

• Amano Shrimp — Peaceful temperament, similar adult size.
• Bamboo Shrimp (Wood/Fan Shrimp) — Peaceful temperament, similar adult size.
• Black Neon Tetra — Peaceful temperament, similar adult size.

One caveat on the shrimp and snails here: engine-cleared means a size, temperament and water-needs fit — it is not a guarantee of safety. An individual Tiger Barb may still hunt shrimp or pick at small snails, and temperament varies from fish to fish, so add invertebrates cautiously, give them cover, and watch the first encounters.

See the full Tiger Barb tank mates guide →

Breeding & sexing

Tiger barbs are among the easier egg-scatterers — easy to moderate difficulty — but they are free spawners with no parental care that eat their own eggs, so a community tank yields nothing. For a real spawn, set up a separate, dimly-lit tank with soft, slightly acidic water and a mesh grid, fine-leaved plants or spawning mops so the eggs fall out of reach. Condition a pair or small group hard on live and frozen foods first. A female can release around 200–300 eggs per spawn (up to about 500 documented) and may spawn roughly every two weeks when well fed. Eggs hatch in about 24–48 hours and the fry are free-swimming a day or so later; start them on infusoria-grade foods, moving on to microworm and Artemia nauplii, and remove the adults immediately after spawning.

Lifespan

Five to seven years is the consistently cited range, with good husbandry reaching the upper end and around seven the defensible ceiling. What shortens it is almost always social: chronic stress from too small a group or an undersized tank, where constant chasing burns condition and frayed fins invite bacterial infection. Poor or unstable water, overfeeding, and the genetic fragility of heavily inbred stock do the rest.

Common mistakes

• Keeping too few. Groups of one to five turn the barbs' hierarchy-nipping outward onto tankmates and the weakest barb. Buy eight to twelve or more; treat six as an under-spec minimum.
• Mixing them with long-finned or slow fish — bettas, angelfish, fancy guppies, gouramis, goldfish, veiltail or fancy anything. Their trailing fins are a prime nipping target and they cannot escape the barbs' speed. This is why those species are excluded from this fish's recommended tankmates outright, even when a simple size match would clear them.
• Too small or too tall a tank. They need length to spread the school; 20 gallons is the floor, 30-plus the real target.
• Keeping them too cool. Colour fades below about 21 °C and washes out near 19 °C; aim for the mid-20s Celsius, unlike cool-water tetras.
• Buying poor, inbred or dyed stock. Avoid deformed, faded or "painted" fish and pick active, vivid specimens.

Signs of trouble

• Faded colour and clamped fins — usually chronic harassment in an under-sized group, or being kept too cool.
• Frayed or nipped fins on the lowest-ranked barbs, often followed by fin rot — the marker of a group that is too small.
• Hiding, hanging in a corner or at the surface, and loss of appetite — stress-driven decline.
• White spots plus flashing or scratching against décor — ich, typically triggered by chilling or poor water.
• A barb that is being singled out and relentlessly chased rather than briefly squabbled with — a sign the school is too small to diffuse the pecking order.

Is this fish right for you?

Do not buy tiger barbs if you want a calm community centrepiece, if you keep or want to keep bettas, angelfish, fancy guppies, gouramis or goldfish, if you only have a small or tall tank, or if you won't commit to a school of at least eight. On stock quality: dyed or "painted" tiger barbs are a welfare red flag — never buy them. Note that GloFish are a different thing entirely, genuinely genetically fluorescent rather than dyed, but they are banned in the EU and some jurisdictions, so check local law.

Common questions

How many tiger barbs should I keep?

Eight to twelve or more. A large school turns their compulsive fin-nipping inward, spreading it harmlessly across many fish. Six is a bare minimum, not a goal; groups of one to five redirect the nipping onto tankmates and the weakest barb.

Can tiger barbs live with bettas, angelfish or guppies?

No. Long-finned, slow fish like bettas, angelfish, fancy guppies, gouramis and goldfish are the classic disaster — their trailing fins are an irresistible nipping target and they cannot escape the barbs' speed. This is the number-one tiger barb mistake.

What tank size do tiger barbs need?

20 US gallons is the floor, but 30-plus with an 80 cm or longer footprint is the real target. The limit is swimming room and group size, not bioload — a long tank lets the school spread out so hierarchy chasing stays harmless.

What temperature do tiger barbs like?

Aim for 24–26 °C and warmer, not the cool end. Body colour decays below about 21 °C and the stripes dim near 19 °C, so don't keep them cold like neon tetras.

Are GloFish tiger barbs dyed?

No. GloFish are genetically engineered to fluoresce, using fluorescent-protein genes from a jellyfish and a sea coral; the glow is heritable and permanent. Dyed or "painted" tiger barbs are a separate, harmful practice and a welfare red flag.

What's a good tank mate for tiger barbs?

Fast, robust, short-finned fish that match their speed — other barbs, danios, larger sturdy tetras, and bottom-dwellers out of the firing line like Corydoras and clown or kuhli loaches. Avoid anything slow, timid, tiny or long-finned.

Sources & confidence

Sources & confidence (9 species)

These back the Tiger Barb 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.

• Tiger Barb Puntigrus tetrazona — Seriously Fish (Puntigrus tetrazona) seriouslyfish.com/species/puntigrus-tetrazona high confidence
• Amano Shrimp Caridina multidentata — Aquarium Co-Op amano shrimp care; Aquadiction high confidence
• Bamboo Shrimp (Wood/Fan Shrimp) Atyopsis moluccensis — Aquariadise (aquariadise.com/caresheet-bamboo-shrimp-atyopsis-moluccensis) high confidence
• Black Neon Tetra Hyphessobrycon herbertaxelrodi — Seriously Fish / Aqua-Fish (Hyphessobrycon herbertaxelrodi) high confidence
• Black Phantom Tetra Hyphessobrycon megalopterus — Seriously Fish (Hyphessobrycon megalopterus) high confidence
• Bleeding Heart Tetra Hyphessobrycon erythrostigma — Seriously Fish (Hyphessobrycon erythrostigma) 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

Care-guide sources (8)

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 — Puntigrus tetrazona — authority (Bleeker 1855), family, max 7.0 cm TL, temp 20-26 C, pH 6-8, dH 5-19, range, diet, IUCN Least Concern, "notoriously aggressive"/fin-nipper, do-not-house-with-long-finned note
• Seriously Fish — Puntigrus tetrazona — endemic central/southern Sumatra, biotope and wild water, 50-60 mm SL, 80x30 cm minimum, 4-5x flow, "at least 8-10" to reduce fin-nipping, tankmate lists, egg-scatter breeding, morphs, inbreeding/dye warning
• Wikipedia — Tiger barb — adult 7-10 cm, ~7 yr lifespan, colour decays <21 C and dims at 19 C, groups of 6+, morphs incl. GloFish, ~300 eggs (up to 500), spawn every ~2 weeks, maturity 6-7 weeks
• Wikipedia — GloFish — Zhiyuan Gong/NUS 1999, GFP (jellyfish) + RFP (coral) transgenes, Yorktown Technologies 2003 US launch, Spectrum Brands 2017, FDA non-regulation, California ban then lift, EU prohibition, heritable not dyed
• Aquarium Source — Tiger Barb 101 — adult ~3 in, lifespan 5-7 yr, ideal ~74 F, pH 6.5 best, 20 gal min / 30 recommended, semi-aggressive fin-nipper, avoid slow/long-finned tankmates, diet, sexing, ich
• Tiger-barb aggression/group consensus (AquariumStocking, AquariumNexus, AllAquariumFish, TFH Magazine) — 8-12+ keeps aggression internal, strict pecking-order nipping, small groups may kill each other or attack tankmates, "compulsive hierarchy behaviour"
• Tankmate consensus (AquariumStoreDepot, FishLab, A-Z Animals, Hepper) — avoid angelfish/goldfish/guppies/bettas (long fins = prime nip target), keep fast robust species; guppies "docile with long flowing fins... a prime target"
• Green/albino tiger barb morph consensus (Seahorse Aquariums, PangoVet, AquariumDomain) — green = selectively-bred melanistic Tyndall-effect with no wild population; albino/gold = recessive strains; same species and care

More on Tiger Barb

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 →