Rainbow cichlid tank mates
A moderate-sized cichlid at 12 cm with yellow-and-green colouring that intensifies during breeding. Calmer than most Central American cichlids but still needs territory.
Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.
Best tank mates (on file)
Merged from conservative safest and best with fields — de-duplicated by species.
The Rainbow cichlid profile lists Boesemani Rainbowfish as both safe and a recommended pairing. Boesemani Rainbowfish schools in groups of 6 or more, so plan room for the whole group rather than one fish.
The Rainbow cichlid 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.
The Rainbow cichlid profile lists Kribensis as both safe and a recommended pairing. Kribensis is a semi-aggressive beginner-care species with a 100L minimum. Run the pair checker for your specific tank before stocking.
The Rainbow cichlid profile lists Molly as both safe and a recommended pairing. Molly is a peaceful beginner-care species with a 80L minimum. Run the pair checker for your specific tank before stocking.
The Rainbow cichlid profile lists Sailfin Molly as a recommended pairing. Sailfin Molly is a peaceful beginner-care species with a 120L minimum. Run the pair checker for your specific tank before stocking.
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.
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Both species defend territory. The pairing needs a long footprint and rockwork or planting that breaks the sightline between two defended spots. Run the pair checker before stocking.
Fish to avoid with Rainbow cichlid
From the unsafe list — predation, aggression, or space rules on this profile.
Rainbow cichlid is flagged as predatory or as likely to eat small fish, and Guppy at 5cm is well within an adult Rainbow cichlid's gape.
Rainbow cichlid is flagged as predatory or as likely to eat small fish, and Chili Rasbora at 2cm is well within an adult Rainbow cichlid's gape.
Rainbow cichlid is flagged as predatory or as likely to eat small fish, and Ember Tetra at 2cm is well within an adult Rainbow cichlid's gape.
Tank size and groups
- Published minimum for Rainbow cichlid: 200L — group minimum 1 .
- 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: 200L 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.
Filtration & heating
A 200L minimum tank for Rainbow cichlid needs a filter rated for at least 800L/hr turnover and a heater maintaining 22–32°C.
Similar fish (same category)
- African Cichlid — min 200L
- Convict cichlid — min 200L
- Discus — min 200L
- Firemouth Cichlid — min 200L
- Jack Dempsey — min 200L
- Keyhole cichlid — min 200L
- Angelfish — min 150L
- Electric Blue Acara — min 150L