Should I buy it?
Tinfoil barb
Barbonymus schwanenfeldii
Also known as: schwanefeld's barb
Grows to 35 cm and needs a school. Juvenile 'showpiece' fish sold at 5 cm; outgrows 90% of buyers' setups within a year.
Tinfoil barb tank mates · 300L tank size hub
peaceful · intermediate care
Sources & confidencehigh · partially verified · beginner: not recommended
Checked against several solid care sources that mostly agree. Numbers here are a careful starting point. Your tap water, tank size, and habits decide the rest. How we evaluate.
Best for: Species-appropriate large tanks 500L or more with a school of five and robust companions over 15 cm.
Avoid if: Any tank under 300L, fish under 10 cm, or any planted aquascape (they eat plants).
Common mistakeBuying three cute tinfoil barbs for a 100L planted community is the textbook outgrow-and-strip story. Adults push past 30 cm, need a huge footprint, and treat soft plants as salad. This is a public-aquarium-scale school fish, not a silver tetra for a living-room kit.
Top things that go wrong
- Grows large or needs a very big footprint. Tinfoil barb is often sold at sizes that hide adult length (~35cm) and a published minimum near **500L**. Shop tanks are not adult housing.
- Mouth gap vs tiny tank mates. May eat tank mates small enough to fit the adult mouth — plan adult sizes, not shop sizes.
- Shrimp & snails. Not shrimp-safe — adults, fry, or both get eaten.
What most shops don't tell you
- 1.Shops sell juvenile tinfoil barbs as flashy community fish that “stay manageable.” They do not. Growth is fast, plants disappear, and the peaceful label does not shrink adult space needs. A silver flash in a 60L is a future rehoming ad.
- 2.Purchased for 120 L 'community' tanks as a 'peaceful' barb.
- 3.Housed with shrimp or very small long-fins. The tinfoil outcompetes at feeding and startles them with sheer bulk.
- 4.Sold small and silver, this fish grows to 30 to 35 cm. Filtration, oxygen, and a long footprint matter as much as the raw litre number. Never release outdoors.
About this species
Tinfoil barbs grow to 30 to 35 cm and are peaceful among medium and large community fish. They are wrong for the average 100 L community. They need real volume, strong flow, a secure lid, and long swim paths.
- Bala / silver shark500L min · same group, comparable tank size
- Banded leporinus300L min · same fish family
- Silver dollar300L min · same fish family
- Denison's / red-line torpedo barb250L min · same fish family
- Giant danio200L min · same fish family
- Rainbow / red-tailed black shark200L min · same fish family
- Rosy Barb180L min · same fish family
- Scissortail Rasbora150L min · same fish family
- Bala / silver sharkalso intermediate peaceful, similar tank size
- Clown Loachalso intermediate peaceful, similar tank size
- Common Plecoalso intermediate peaceful, similar tank size
- Denison's / red-line torpedo barbalso intermediate peaceful, similar tank size
- Pictus catfishalso intermediate peaceful, similar tank size
- Silver dollaralso intermediate peaceful, similar tank size
- Bala / silver shark tank mateslists this fish among its recommended pairings
- Banded leporinus tank matesnames this fish as a conditional pairing — read the pair page conditions
- Black ghost knifefish tank matesnames this fish as a conditional pairing — read the pair page conditions
- Jaguar cichlid tank matesnames this fish as a conditional pairing — read the pair page conditions
- Senegal bichir tank matesnames this fish as a conditional pairing — read the pair page conditions
- Silver dollar tank mateslists this fish among its recommended pairings
- Ticto / twospot barb tank mateslists this fish among its recommended pairings
Plan grid
Key limits are above. Here: pH band, swim level, bioload, and activity.
Swim zones
Care snapshot
Quick compare before you buy. Not a score of how “good” the fish is.
- Beginner ease24
- Peacefulness76
- Community fit73
- Small-tank fit38
- Hardiness54
- Energy54
Numbers are deterministic planning indices from Fishori fields — not a scientific score of your individual fish.
Example setups
Starting points only. Run the pair checker for every fish you add.
Match temperature and pH overlap with every tank mate, then verify adult size and group rules on pair pages — Fishori is biased toward boring, survivable plans.
Compatibility
Tank mates for Tinfoil barb
Usually safer (engine GOOD): Bala / silver shark, Boesemani Rainbowfish, Denison's / red-line torpedo barb, Giant danio. Conditional (CAUTION — read the pair page before buying): Corydoras Catfish. Avoid (RISKY): Chili Rasbora, Ember Tetra, Guppy, Neon Tetra, Pea Puffer. Every name links to a live pair check — the lists are a shortlist, not a stocking plan.
Usually safer
Open a pair page with this fish as the starting point.
Needs planning
Read the blocking rule on each pair page before experimenting.
Usually avoid
Do-not-stock combinations on conservative hobby rules.
Compare with
Run a real pair check: Tinfoil barb + Bala / silver shark
Behaviour and temperament
Tinfoil barbs are peaceful toward similar-sized fish and overwhelming toward everything else by sheer size and appetite. They school and stay calmer in a proper group. The damage they do is usually to plants and aquascape, not to a predation chart.
What sets them off
- Sudden crowding
- Poor water quality
Fin nipping: Not a habitual fin-nipper; stressed or crowded individuals can still test fins.
Predation: May eat tank mates small enough to fit the adult mouth — plan adult sizes, not shop sizes.
Territory: Not strongly territorial, but still needs room so its working space does not overlap the next fish.
Planted tanks: excellent — easy plant ideas
In the glass: typical and warning signs
- A group of five or more patrols open water in a long, deep tank and grazes constantly.
- Plant damage and heavy waste are normal ownership at adult size.
- Pacing in a short community tank means the footprint failed months before adult length arrives.
- A thin group that harasses décor is under-stocked for a large schooling barb.
- Low listed malice toward fish; size and speed still overwhelm tiny neighbours.
- In-school sorting looks rough and is still better than a lone giant in a nano.
- Rehome before adult size if the tank cannot reach true large-barb dimensions.
- Pull soft-plant aquascapes that cannot survive constant grazing — the fish will not stop.
Fish behaviour can vary between individuals and tank setups. Always observe new fish closely after introduction.
Water, food, and grouping
Hardness
medium
Diet
omnivore
Tinfoil barbs are large, hungry omnivores that strip soft plants and inhale midwater food. Quality omnivore staples, vegetable matter, and frozen foods in real quantities matter; a community pinch sized for tetras leaves them scavenging décor. Feed a group evenly so the largest fish does not monopolise every wafer and pellet.
Shrimp & snails
Not shrimp-safe — adults, fry, or both get eaten.
Schooling species — buy 5+ together. Smaller groups stress and lose colour.
- Hold 20 to 28 °C steadily on a real thermometer, not the dial on the heater.
- Aim for pH 6 to 7.5 and a hardness you can re-test in two weeks. A one-time strip in the shop car park is not a water test.
- Schooling species. Buy 5 or more from the same tank on the same day before adding any centrepiece fish.
- Tank volume meets or exceeds 500L published minimum for adults.
- You can stock at least 5 individuals (group welfare).
- Heater can hold 20–28°C without cooking cooler-water tank mates.
- No known fin-nippers paired with long-finned fish unless you accept documented risk.
- No tank mates small enough to fit the adult mouth gap for this species.
Explore and stocking hubs
Tank-mates hub, matching guides, category peers, and litre stocking lists around this species’ minimum tank.
Plan with tools
Check mates as pairs first, then add this fish in the tank builder for the full stocking.
Filtration & heating
A 500L minimum tank needs a filter rated for at least 2000L/hr turnover and a heater to hold 20–28°C reliably.
Plant suggestions
Tinfoil barb does well in planted tanks. Plants compatible with 20–28°C and pH 6–7.5:
Research: partially verified · Confidence: high · 3 linked source(s). We do not invent citations.
How Fishori evaluates compatibility (same logic as pair and tank tools).
- Seriously Fish. Barbonymus schwanenfeldii
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Barbonymus schwanenfeldii
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Barbonymus schwanenfeldii
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
Evidence notes
- The Seriously Fish profile for the binomial in this record was successfully reached as the primary aquarium reference.
- FishBase contributes natural-range size and habitat context. Translate those numbers through your heater, your water report, and your tank footprint before stocking.
- Wikipedia is only cited if the article URL returned OK. Use it for orientation, not as the only care sheet for an import.
- All compatibility text reflects typical hobby experience and the Fishori model. Individual fish, shop stress, and the order tank mates are added in can still defy a single-paragraph label.
Common questions about Tinfoil barb
- How big do Tinfoil barb get?
- Tinfoil barb adults run about 30–35 cm. In home tanks they usually land near 35 cm — plan space and filtration for that, not the juvenile in the shop bag.
- What size tank does Tinfoil barb need?
- 500L is the planning floor for adult swimming space and bioload. A 600L+ tank is the more comfortable long-term footprint. Length and depth matter as much as raw litres for active or territorial fish.
- Are Tinfoil barb aggressive?
- Tinfoil barbs are peaceful toward similar-sized fish and overwhelming toward everything else by sheer size and appetite. They school and stay calmer in a proper group. The damage they do is usually to plants and aquascape, not to a predation chart.
- Do Tinfoil barb need to be kept in a group?
- Schooling species — buy 5+ together. Smaller groups stress and lose colour.
- What is the most common mistake with Tinfoil barb?
- Buying three cute tinfoil barbs for a 100L planted community is the textbook outgrow-and-strip story. Adults push past 30 cm, need a huge footprint, and treat soft plants as salad. This is a public-aquarium-scale school fish, not a silver tetra for a living-room kit.
- What fish can live with Tinfoil barb?
- The Tinfoil barb profile lists Bala / silver shark, Boesemani Rainbowfish, Denison's / red-line torpedo barb, Giant danio among its safer pairings (engine-checked GOOD). Corydoras Catfish is conditional (CAUTION): workable only with the specific conditions on its pair page. Avoid Chili Rasbora, Ember Tetra, Guppy, Neon Tetra (RISKY). Run the pair checker for your exact water and tank size before stocking.