Guppy tank mates
Guppy tank mates are easy to find and easy to get wrong for one reason: the guppy itself is the provocation. Those trailing tails read as a challenge to bettas and as a snack-sized flag to anything with a nipping habit, which is why tiger barbs and male bettas sit on the avoid list of an otherwise agreeable fish. The rest of the planning is chemistry and arithmetic. Guppies want hard alkaline water, so the classic pairing is other livebearers and hard-water-tolerant catfish rather than soft-water tetras. And a mixed-sex guppy group turns into dozens of fry a month; some keepers pick tank mates that eat a share of the fry on purpose, because the alternative is an overstocked tank by autumn. Peaceful, hard-water, short-finned neighbours are the pattern. Everything on the safe list below fits it.
Our first pick
Corydoras Catfish. They ignore fry, fins and food squabbles entirely, hold the bottom of the tank, and cope with the same hard tap water guppies want. Run the pair check →
Common mistakeIgnoring sex ratios is the guppy mistake that turns a pretty starter tank into shredded females and a fry flood. One male with multiple females reduces harassment; several males with one female does the opposite. Plan the ratio and a backup plan for young before you buy the first bag. Colour morphs do not override basic livebearer maths.
Each name below opens a pair check with Guppy. 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 Guppy 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 Guppy stays in the top, so the two will not crowd the same water column.
The Guppy profile lists Honey Gourami as both safe and a recommended pairing. Honey Gourami is a peaceful beginner-care species with a 40L minimum. Run the pair checker for your specific tank before stocking.
The Guppy profile lists Platy as both safe and a recommended pairing. Platy is a peaceful beginner-care species with a 60L minimum. Run the pair checker for your specific tank before stocking.
Risky or situational
May work with more water, a mature system, or a species-only setup. Read the pair page before you experiment.
Betta is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Guppy. Run the pair checker before stocking.
Tiger Barb is flagged as a fin-nipper and Guppy 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 Guppy. Run the pair checker before stocking.
Fish to avoid with Guppy
Predation, aggression, or space rules on this profile. Treat these as poor default mixes.
Jack Dempsey reaches 25cm and is flagged predatory. Guppy at 5cm is prey-sized for it. Jack Dempsey needs at least 200L, far above the 40L minimum for Guppy. The tank that houses one stresses the other. Jack Dempsey is rated aggressive and Guppy is rated peaceful. No community-style planning carries that gap.
Oscar reaches 35cm and is flagged predatory. Guppy at 5cm is prey-sized for it. Oscar needs at least 300L, far above the 40L minimum for Guppy. The tank that houses one stresses the other. Oscar is rated aggressive and Guppy is rated peaceful. No community-style planning carries that gap.
Tank size and groups
- Published minimum for Guppy: 40L. Group minimum 3 .
- 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: 40L hub.
Plan before you buy
Start a pair check with Guppy, or open a starter plan with the top safer companions in the builder.
Tank hubs: 40L
Related reading
Guides that list other fish with the same trait, so you can plan around the group rather than one row.
- Schooling & group fish →
Plan the group of 3+ before choosing tank mates.
- Beginner-friendly freshwater fish →
Guppy is on this list. Hardier options for a first stock.
- Peaceful community fish →
Other peaceful species to shortlist beside Guppy.
Filtration & heating
A 40L minimum tank for Guppy needs a filter rated for at least 160L/hr turnover and a heater maintaining 22–28°C.
Similar fish (same category)
- Endler's Livebearer · min 40L
- Platy · min 60L
- Molly · min 80L
- Swordtail · min 80L
- Sailfin Molly · min 120L
Related (care + temperament)
Other species that list Guppy
Reverse lookup: these profiles reference Guppy under safe or “best with” lists.
Featured compatibility checks
Curated pair pages for Guppy. Each opens a full verdict — not just a list label.
Guppy tank mates — quick answers
- What fish can live with Guppy?
- Usually safer companions on this hub include Corydoras Catfish, Honey Gourami, Platy. Open each pair check before you buy — the list is a shortlist, not a guarantee.
- What tank mates should you avoid with Guppy?
- Avoid Jack Dempsey, Oscar based on size, temperament, or predation risk on this profile.
- What size tank do Guppy need for a community?
- 60L is the practical floor. Smaller tanks crash under the bioload of a breeding colony, and males harass single females in cramped footprints.