Brown / hockey-stick pencilfish tank mates
A 5 cm torpedo pencilfish that prefers blackwater soft conditions. Peaceful and shrimp-safe. Needs tannins and soft water for full lateral colouring.
Common mistakeKeeping brown pencilfish in standard hard tropical community water is how keepers invent faded 'hockey sticks' with no red line left. They want soft, acidic, tannin-stained conditions and micro-foods. A bright hard-water community flake tank is the wrong ownership plan.
Each name below opens a pair check with Brown / hockey-stick pencilfish. That check is the decision, not the list itself.
Usually safer companions
Conservative shortlist from this profile. Open a pair page before you buy.
The Brown / hockey-stick 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.
The Brown / hockey-stick 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. Ember Tetra grows to about 2cm, which is borderline mouth-size for an adult 5cm Brown / hockey-stick pencilfish.
The Brown / hockey-stick pencilfish profile lists Harlequin Rasbora as a recommended pairing. Harlequin Rasbora schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Risky or situational
May work with more water, a mature system, or a species-only setup. Read the pair page before you experiment.
Angelfish reaches 20cm and is flagged predatory or as likely to eat small fish. Adult-size Brown / hockey-stick pencilfish at 5cm is inside that gape range. Angelfish is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Brown / hockey-stick pencilfish. Run the pair checker before stocking.
Betta is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Brown / hockey-stick pencilfish. Run the pair checker before stocking.
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Pea Puffer is flagged as a fin-nipper and Brown / hockey-stick 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. Pea Puffer is flagged predatory. Equal-size adults usually coexist, but the moment one is stressed, sick, or smaller after a moult, it becomes prey. Pea Puffer is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Brown / hockey-stick pencilfish. Run the pair checker before stocking.
Tiger Barb is flagged as a fin-nipper and Brown / hockey-stick 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 Brown / hockey-stick pencilfish. Run the pair checker before stocking.
Fish to avoid with Brown / hockey-stick pencilfish
Predation, aggression, or space rules on this profile. Treat these as poor default mixes.
African Cichlid reaches 15cm and is flagged predatory. Brown / hockey-stick pencilfish at 5cm is prey-sized for it. African Cichlid is rated aggressive and Brown / hockey-stick pencilfish is rated peaceful. No community-style planning carries that gap.
Jack Dempsey reaches 25cm and is flagged predatory. Brown / hockey-stick pencilfish at 5cm is prey-sized for it. Jack Dempsey is rated aggressive and Brown / hockey-stick pencilfish is rated peaceful. No community-style planning carries that gap.
Oscar reaches 35cm and is flagged predatory. Brown / hockey-stick pencilfish at 5cm is prey-sized for it. Oscar needs at least 300L, far above the 100L minimum for Brown / hockey-stick pencilfish. The tank that houses one stresses the other. Oscar is rated aggressive and Brown / hockey-stick pencilfish is rated peaceful. No community-style planning carries that gap.
Tank size and groups
- Published minimum for Brown / hockey-stick pencilfish: 100L. 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: 100L hub.
Easier alternatives to consider
Hardier first-tank names from the library. Still read the profile. Not a substitute for reading this one.
Plan before you buy
Start a pair check with Brown / hockey-stick pencilfish, or open a starter plan with the top safer companions in the builder.
Tank hubs: 100L
Related reading
Guides that list other fish with the same trait, so you can plan around the group rather than one row.
- Fish that eat smaller tank mates →
Brown / hockey-stick pencilfish may eat anything that fits in its mouth as it grows.
- Schooling & group fish →
Plan the group of 6+ before choosing tank mates.
- Peaceful community fish →
Other peaceful species to shortlist beside Brown / hockey-stick pencilfish.
Filtration & heating
A 100L minimum tank for Brown / hockey-stick pencilfish needs a filter rated for at least 400L/hr turnover and a heater maintaining 24–28°C.
Similar fish (same category)
- Black ruby barb · min 100L
- Ticto / twospot barb · min 100L
- Gold / Chinese barb · min 120L
- Golden / Beckford's pencilfish · min 80L
- Odessa Barb · min 120L
- Pearl Danio · min 80L
- Cherry Barb · min 60L
- Dwarf pencilfish · min 60L
Related (care + temperament)
Brown / hockey-stick pencilfish tank mates — quick answers
- What fish can live with Brown / hockey-stick pencilfish?
- Usually safer companions on this hub include Dwarf Gourami, Ember Tetra, Harlequin Rasbora. Open each pair check before you buy — the list is a shortlist, not a guarantee.
- What tank mates should you avoid with Brown / hockey-stick pencilfish?
- Avoid African Cichlid, Jack Dempsey, Oscar based on size, temperament, or predation risk on this profile.
- What size tank do Brown / hockey-stick pencilfish need for a community?
- 100L is the planning floor for adult swimming space and bioload. A 122L+ tank is the more comfortable long-term footprint. Length and depth matter as much as raw litres for active or territorial fish.