What fish can live with Golden / Beckford's pencilfish?

Use the "Often compatible" lists as a shortlist, not a stocking plan. Always run the pair tool and check the footprint of your actual tank first. Verify behaviour for Golden / Beckford's pencilfish against your own reading before you buy.

What tank mates should you avoid with Golden / Beckford's pencilfish?

Avoid African Cichlid, Oscar, Green Terror based on size, temperament, or predation risk on file.

What size tank do Golden / Beckford's pencilfish need for a community?

80L is the planning floor for adult swimming space and bioload headroom. Long-term, a 98L+ tank lets adults use the full footprint without crowding the next species. Footprint, meaning length and front-to-back depth, matters as much as raw volume for active or territorial species.

Golden / Beckford's pencilfish tank mates

A 4.5 cm pencilfish with a golden lateral flash. More tolerant of moderate hardness than brown or dwarf pencilfish. Still needs a school and quiet conditions.

Evidence: partially verified

Confidence: high

Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.

← Full Golden / Beckford's pencilfish profile·Compatibility checker·Tank builder·More barb

Best tank mates (on file)

Merged from conservative safest and best with fields — de-duplicated by species.

Corydoras Catfish Pair check
The Golden / Beckford's pencilfish profile lists Corydoras Catfish as both safe and a recommended pairing. Corydoras Catfish schools in groups of 6 or more, so plan room for the whole group rather than one fish. Corydoras Catfish swims in the bottom zone while Golden / Beckford's pencilfish stays in the top, so the two will not crowd the same water column.
Dwarf Gourami Pair check
The Golden / Beckford's pencilfish profile lists Dwarf Gourami as both safe and a recommended pairing. Dwarf Gourami is a peaceful beginner-care species with a 60L minimum. Run the pair checker for your specific tank before stocking.
Ember Tetra Pair check
The Golden / Beckford's pencilfish profile lists Ember Tetra as both safe and a recommended pairing. Ember Tetra schools in groups of 8 or more, so plan room for the whole group rather than one fish.
Glowlight Tetra Pair check
The Golden / Beckford's pencilfish profile lists Glowlight Tetra as a recommended pairing. Glowlight Tetra schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Neon Tetra Pair check
The Golden / Beckford's pencilfish profile lists Neon Tetra as both safe and a recommended pairing. Neon Tetra schools in groups of 6 or more, so plan room for the whole group rather than one fish.

Risky or situational

From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.

German Blue Ram Open pair check
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Betta Open pair check
Betta is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Golden / Beckford's pencilfish. Run the pair checker before stocking.
Angelfish Open pair check
Angelfish reaches 20cm and is flagged predatory or as likely to eat small fish. Adult-size Golden / Beckford's pencilfish at 4.5cm is inside that gape range. Angelfish is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Golden / Beckford's pencilfish. Run the pair checker before stocking.
Tiger Barb Open pair check
Tiger Barb is flagged as a fin-nipper and Golden / Beckford's pencilfish carries the long-finned risk profile (veil tails, trailing fins). Expect torn fins within days unless the nipper is in a proper group and the long-finned fish has plenty of cover. Tiger Barb is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Golden / Beckford's pencilfish. Run the pair checker before stocking.
Jack Dempsey Open pair check
Jack Dempsey reaches 25cm and is flagged predatory or as likely to eat small fish. Adult-size Golden / Beckford's pencilfish at 4.5cm is inside that gape range. Jack Dempsey is rated aggressive, so expect chasing, fin damage, or display behaviour directed at Golden / Beckford's pencilfish. Run the pair checker before stocking.

Fish to avoid with Golden / Beckford's pencilfish

From the unsafe list — predation, aggression, or space rules on this profile.

African Cichlid See why (pair)
African Cichlid reaches 15cm and is flagged predatory. Golden / Beckford's pencilfish at 4.5cm is prey-sized for it. African Cichlid needs at least 200L, far above the 80L minimum for Golden / Beckford's pencilfish. The tank that houses one stresses the other. African Cichlid is rated aggressive and Golden / Beckford's pencilfish is rated peaceful. No community-style planning carries that gap.
Oscar See why (pair)
Oscar reaches 35cm and is flagged predatory. Golden / Beckford's pencilfish at 4.5cm is prey-sized for it. Oscar needs at least 300L, far above the 80L minimum for Golden / Beckford's pencilfish. The tank that houses one stresses the other. Oscar is rated aggressive and Golden / Beckford's pencilfish is rated peaceful. No community-style planning carries that gap.
Green Terror See why (pair)
Green Terror reaches 30cm and is flagged predatory. Golden / Beckford's pencilfish at 4.5cm is prey-sized for it. Green Terror needs at least 300L, far above the 80L minimum for Golden / Beckford's pencilfish. The tank that houses one stresses the other. Green Terror is rated aggressive and Golden / Beckford's pencilfish is rated peaceful. No community-style planning carries that gap.

Tank size and groups

Published minimum for Golden / Beckford's pencilfish: 80L — group minimum 6 (schooling).
Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
Nearest litre hub to this minimum: 80L hub.

Easier alternatives to consider

Conservative beginner-peaceful picks from the library — not replacements for reading, but a shorter on-ramp than this species for a first tank.

Plan before you buy

Pair checks for every mix, then multi-species stocking in the builder.

Open compatibility checker Tank builder

Filtration & heating

A 80L minimum tank for Golden / Beckford's pencilfish needs a filter rated for at least 320L/hr turnover and a heater maintaining 24–28°C.

Filter buying guide →Heater buying guide →Beginner plants guide →

Related (care + temperament)

Other species that list Golden / Beckford's pencilfish

Reverse lookup: these profiles reference Golden / Beckford's pencilfish under safe or “best with” lists.

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