Pygmy Corydoras tank mates
Pygmy cories are so small that most 'community safe' lists quietly stop applying. The honest answer is a short safe list and a long conditional one: micro fish and shrimp work, ordinary community tanks mostly do not. The lists below tell you which side each candidate falls on and why.
Common mistakeExpecting pygmy cories to behave like classic bottom-dwellers is how keepers invent a midwater school with nowhere to swim. They school off the substrate and need tank height. Plan thirty-litre-plus planted height with six or more — a flat shallow tray wastes what makes Corydoras pygmaeus charming.
Each name below opens a pair check with Pygmy Corydoras. 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 Pygmy Corydoras profile lists Celestial Pearl Danio as both safe and a recommended pairing. Celestial Pearl Danio schools in groups of 8 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 Pygmy Corydoras at 3cm is inside that gape range. Angelfish is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Pygmy Corydoras. Run the pair checker before stocking.
Betta is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Pygmy Corydoras. 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.
Tiger Barb is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Pygmy Corydoras. Run the pair checker before stocking.
Fish to avoid with Pygmy Corydoras
Predation, aggression, or space rules on this profile. Treat these as poor default mixes.
Jack Dempsey reaches 25cm and is flagged predatory. Pygmy Corydoras at 3cm is prey-sized for it. Jack Dempsey needs at least 200L, far above the 30L minimum for Pygmy Corydoras. The tank that houses one stresses the other. Jack Dempsey is rated aggressive and Pygmy Corydoras is rated peaceful. No community-style planning carries that gap.
Oscar reaches 35cm and is flagged predatory. Pygmy Corydoras at 3cm is prey-sized for it. Oscar needs at least 300L, far above the 30L minimum for Pygmy Corydoras. The tank that houses one stresses the other. Oscar is rated aggressive and Pygmy Corydoras is rated peaceful. No community-style planning carries that gap.
Tank size and groups
- Published minimum for Pygmy Corydoras: 30L. 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: 30L hub.
Plan before you buy
Start a pair check with Pygmy Corydoras, or open a starter plan with the top safer companions in the builder.
Tank hubs: 30L
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 6+ before choosing tank mates.
- Beginner-friendly freshwater fish →
Pygmy Corydoras is on this list. Hardier options for a first stock.
- Peaceful community fish →
Other peaceful species to shortlist beside Pygmy Corydoras.
Filtration & heating
A 30L minimum tank for Pygmy Corydoras needs a filter rated for at least 120L/hr turnover and a heater maintaining 22–26°C.
Similar fish (same category)
- Corydoras Catfish · min 60L
- Julii Corydoras · min 60L
- Panda Corydoras · min 60L
- Salt and pepper cory / dwarf cory · min 60L
- Adolfoi cory · min 80L
- Glass Catfish · min 80L
- Peppered Corydoras · min 80L
- Bronze corydoras · min 100L
Related (care + temperament)
Other species that list Pygmy Corydoras
Reverse lookup: these profiles reference Pygmy Corydoras under safe or “best with” lists.
Pygmy Corydoras tank mates — quick answers
- What fish can live with Pygmy Corydoras?
- Usually safer companions on this hub include Celestial Pearl Danio. Open each pair check before you buy — the list is a shortlist, not a guarantee.
- What tank mates should you avoid with Pygmy Corydoras?
- Avoid Jack Dempsey, Oscar based on size, temperament, or predation risk on this profile.
- What size tank do Pygmy Corydoras need for a community?
- 30L is the planning floor for adult swimming space and bioload. A 37L+ tank is the more comfortable long-term footprint. Length and depth matter as much as raw litres for active or territorial fish.